COMPUTER NEWS (March to May, 1994, No. 55)

                                                Tel No.
General Enquiries                               8592495
Fax                                             5597904
Computer Operations                             8592496
  (Hardward and operational problems)
Help Desk                                       8592480
  (Software and general problems)
Hardware Maintenance                            8592774
Dial-up Services
        24-hr service line                      8592595
        24-hr service line                      5480590
        Night service line                      8597992
        (6 pm - 8 am next day)


Computer Centre Opening Hours

Normal Schedule (Sept 13, 1993 - June 13, 1994)

   Monday (8:00 a.m.) - Saturday (9:00 p.m.)
   Sunday (12:00 noon) - Sunday (7:00 p.m.)
   Close on Holidays
(All central host systems will be running unattended during the closing hours.)

Summer Schedule (June 14, 1994 - Sept 11, 1994)

   Monday (8:00 a.m.) to Saturday (3:30 p.m.)
   Close on Sundays and Holidays
(All central host systems will be running unattended during the closing hours.)

Microcomputer / Workstation Schedule

Run Run Shaw Building (Rm. 101, 103, 104) :
        Monday (8:30 a.m.) - Saturday (8:30 p.m.)
        Sunday (12:30 noon) - Sunday (6:30 p.m.)

Run Run Shaw Building (Rm. 113, 210),
Knowles Building (Rm. 218) and
K.K. Leung Building (Rm. LG-108) :
        Monday (8:30 a.m.) - Saturday (8:30 p.m.)
        Sunday (12:30 noon) - Sunday (6:30 p.m.)
        Close on Sundays and Holidays



The Birthday of Her Majestry the Queen (11-13/6/94) and Tuen Ng Festival (14/6/94)

Computer Centre will be closed on Saturday, June 11, 1994 at 8.00 a.m. and will be open on Wednesday, June 15, 1994 at 8:00 a.m. after the holidays.

System Maintenance

VAX 6420 (HKUCC)

Wednesday, June 1, 1994

10:00 a.m. - 12:00 noon



In the academic year 1993-1994, there are many notable developments of the University Campus Network. Some of the projects have been completed, some are still in progress and some are being planned.

To keep our staff and students abreast of the development status, we summarise below the projects that have been completed recently or planned to start in the next few months. A schematic network diagram of the current structure of our Campus Network is also given in the Appendix.

FDDI Network Backbone in the Main Campus

FDDI (Fibre Distributed Data Interface) is a more advanced and high-speed network technology in comparison with the10 Mbps Ethernet technology that has been employed in our Campus Network since its inception in 1987. Nodes on a FDDI network backbone can transfer data up to a rate of 100 Mbps. Hence it is the natural development for improving the situations where heavy traffic strains the existing Ethernet network capability.

FDDI technology was first introduced to the University Campus Network in October 1992. The FDDI network backbone started off with 2 nodes, linking the networks in Computer Centre and the Haking Wong Building. With a year's experience of improved network performance provided by the pilot FDDI set-up, the FDDI backbone is expanded with additional nodes installed in the K.K. Leung Building, Knowles Building, Old Library Building and the Run Run Shaw Building in October 1993. The recently completed Chong Yuet Ming Science Buildings have joined the FDDI backbone in January this year (see below). It is also our plan to put those major buildings currently under construction on the FDDI backbone.

Network Extension to J and K Blocks of the Queen Mary Hospital

We are pleased to announce that the Campus Network has been extended to this site, the J and K blocks of Queen Mary Hospital, since February this year. Since these buildings are not the premises of the University, construction of network infrastructure within these buildings could only be done through coordinations with the Government Architectural Service Department and the Hospital. Although this project was first initiated in 1989 it was not until early 1993, after many rounds of discussions among the involved parties, that an agreeable arrangement could be finalised.

Network in these two buildings are now provided by twisted-pair cables (10 Mbps data transfer rate) linking individual computer points to central hubs, where connection to other parts of the Campus network is made. This twisted- pair cabling system is referred to as 10BaseT Ethernet, as distinguished from the earlier type of 10Base2 Ethernet technology using thin coaxial cables which we installed in most parts of the campus.

Through a pair of optical fibres previously installed by Department of Medicine, the network of the J & K Blocks is connected to the Professorial Block of the hospital in which a remote network router is provided for linking the hospital to the University Campus Network through a 64 Kbps data line. We would like to acknowledge Professor S.K. Lam's help in providing the mentioned optical fibre for extending the Campus Network to the J and K Blocks.

Network Extension to Peripheral Buildings and New Buildings

-University Pathology Building

The Campus Network is being extended to this building by means of a 10Base2 cable link and a pair of optical fibres running through the Clinical Pathology Building from Block K of the Queen Mary Hospital. The computer network cables required within the building are being laid. We expect that the installation of network connections for the PC-workstations could be completed very soon.

-Premises in Sassoon Road Area

These include the Old Clinical Student Residence (currently under renovation), Pauline Chan Building, Estates Office and the Laboratory Animal Unit. Optical fibres will soon be installed to link these sites together with the Patrick Manson Building where connection to the Campus Network is provided through a 64Kbps data line.

-Tang Chi Ngong Building

As an interim arrangement, this building will soon be linked to the Campus Network through a low-speed leased data circuit. Installation of computer cables in this building has been scheduled and will take place in the next two months. Users in this building should be able to have access to the Campus Network services by this summer.

We hope that a direct and high-speed network link to this building can ultimately be implemented. We are working with the Estates Office in studying how this can be done.

-Phase IV (Chong Yuet Ming Science Buildings)

As mentioned above, the recently completed Chong Yuet Ming Science Buildings have been linked to the FDDI network backbone in January. Like Blocks J & K of the Queen Mary Hospital, twisted-pair 10BaseT Ethernet cables are installed for network connections in this group of buildings.

-Phase V and Phase VI

Plans have been made to put the buildings of these two development phases on the FDDI backbone. Close coordination with the Estates Office is now under way to ensure that the Campus Network can be extended to these buildings once they are completed.

Other Developments

-Departmental Laboratories

The Computer Committee has decided to provide network connections to some laboratories as requested earlier by a number of departments. As the first phase of development in this respect, works are being initiated in installing trunkings and cables for the requests made by the following departments and we expect that network connectivity to those laboratories could be available in the new academic year.

-Department of Mechanical Engineering,
-Department of Civil & Structural Engineering,
-Department of Industrial and Manufacturing Systems Engineering,
-Department of Surveying,
-Department of Psychology,
-Department of Economics.
Centrally Administered Classrooms

Arrangements are being made to provide network connections to some of the centrally administered classrooms during this summer. We are discussing with the CMR in deciding an implementation schedule.

T.Y. Shen
Tel : 859 2482
E-mail :


Since the announcement of the trial services of the HKUCC1 (Alpha/Open VMS) system in the January/February issue of Computer News, many enhancements have been made to the system.

Firstly, TCP/IP communication software has been installed and hence users can telnet to HKUCC1. The hkumenu user interface has been implemented and all functions found on hkumenu are now available. The hkumenu is the standard user interface which is found on all systems of Computer Centre and can be invoked at the system prompt by typing hkumenu. Through hkumenu, you can select any of the following network services :

- USENET and other Bulletin Boards
- Mail (electronic mail)
- HKU and other UPGC Institution Libraries
- Hytelnet (Internet, for gaining access to various services on Internet, 
  including on-line library catalogues of overseas tertiary  institutions) 
- Sendfax: Send fax to local fax machines connected to a fax line
The batch queues setup on HKUCC1 are the same as those of the HKUCC system.

There are 3 batch queues :

  Batch Queue                       CPU Time
  -----------                       --------

  LARGEQ                            10 hours
  SYS$BATCH                          2 hours
  SMALLQ                            10 minutes 
SYS$BATCH is the default batch queue, i.e. if you do not specify to which queue a job is submitted, it will be submitted to the SYS$BATCH queue for processing and the maximum CPU time for the job will be limited to 2 hours.

If you want to know more about the HKUCC1 system or wish to move your works from HKUCC to HKUCC1, you can contact the undersigned.

C.M. Mak
Tel : 8592491
E-mail :


In addition to the HKUCC, HKUXA, HKUXB and HKUSUB systems, we have now expanded our host laser printing service to encompass the new systems HKUSUA and HKUCC1.

Laser printing requests initiated from any host computer will be directed to the HP LaserJet 4M printer at the Laser Printer Counter in Room RR103. Users can collect their laser printing output from the Laser Printer Counter during the service opening hours:

Mon. - Fri. : 9:30 am -  4:30 pm
Sat.        : 9:30 am - 12:30 pm
To collect laser printing output, a user has to present to the staff in-charge of the Laser Printer Counter a Laser Printout Coupon for cancellation of the equivalent number of printout pages. Laser Printout Coupons can be purchased from the Centre's General Office at Room RR223. Laser printing is limited to 350K bytes per print file and a user can only submit postscript files for printing during the Laser Printer Counter service opening hours. To submit a postcript file for printing on the HP Laser Jet 4M printer, you can select the item 'Printing' from hkumenu and then select the item 'Print Postscript File to Networked HP LaserJet 4M' from the Printing sub-menu and then enter the name of file to be printed when prompted.

C.M. Mak
Tel : 8592491
E-mail :


We are pleased to announce that the UPCC has recently signed an agreement with the WordPerfect Corp. on the Customer Advantage Programme (CAP) for WordPerfect Products. The CAP offers purchasing and maintenance of licences for the WordPerfect products at attractive prices. The price schedule adopted by UPCC for users to acquire the product licences through CAP is as follows:

Product               New Licence      Maintenance      Maintenance
                                       until 15-5-95    until 15-5-96
                      HK$ per licence  HK$ per licence  HK$ per licence 
DataPerfect               160               80              120
LetterPerfect             100               60               80
PlanPerfect               160               80              120
WordPerfect               160               80              120
WP Words                  120               60               80
WP Presentations          160               80              120

WorPerfect Office 4.0
WP Office Client           80               60               80
WP Office Server        1,000              600              800

WorPerfect Informs 1.0
Informs Designer          160               80              120
Informs Filler            100               60               80

WordPerfect Gateway
MHS Gateway             1,600            1,000            1,200
FAX/Ptr Gateway         2,300            1,400            1,800
X.400 Gateway           3,300            2,000            2,400
SMTP Gateway            3,300            2,000            2,400
Users may choose to take the advantage of either the 'new licence' service, or the 'maintenance' service, or both. In subscribing to the 'maintenance' service, users are entitled to get timely licence upgrades of the software when they are available during the maintenance period. 'Maintenance' service provided by WordPerfect CAP applies both to the newly acquired software licences as well as to any software that were purchased previously. Furthermore, all the licences provided under CAP are 'multi-platformed' which means that the WordPerfect product licences you have bought can be applied to any system platform on which the products are supported, e.g. DOS, Windows, etc.

The prices given above do not include manuals and distribution diskettes. Computer Centre will provide the distribution diskettes at $10 per diskette. Users can purchase the following manuals through Computer Centre :

- WordPerfect for DOS 6.0 Reference Manual                HK$246
- WordPerfect for DOS 6.0 Workbook                        HK$176
- WordPerfect for DOS 6.0 Printer Manual                  HK$176
- WordPerfect for Windows 6.0 Reference Manual            HK$246
- WordPerfect for Windows 6.0 Workbook                    HK$176
Departments interested in acquiring new and/or maintaining old Wordperfect product licences should complete the "Wordperfect CAP Licence Requisition Form" which is obtainable from Computer Centre's General Office, Room 223, Run Run Shaw Building (phone: 8592491), and return it to Computer Centre together with a departmental requisition.

For further information, please contact Miss Henrietta Fung at 859 2491 or the undersigned.

Peter Leung 
Tel :  859 2497 
E-mail :


IBM is offering through UPCC to its member institutions the purchase of the "IBM OS/2 V2.1 for Windows" at a special price. The offer will be valid until the end of May. This specially offered product is a Special Edition supplied directly by the IBM China/Hong Kong Corporation . The product will be in a no-frill package which includes 3.5" distribution media and an installation guide.

"IBM OS/2 V2.1 for Windows" is the package for upgrading Microsoft Windows 3.1 to OS/2 V2.1.

Interested users can purchase the software at the price of US$37.8 through Computer Centre before May 20, 1994. Departmental purchase can be made by sending an official order to Computer Centre . Staff and students can also purchase the software for their personal use. A special request form for personal purchase of "IBM OS/2 V2.1 for Windows" is obtainable from the General Office of the Computer Cnetre, Room RR-223. Interested individual users should complete and return the request form to Computer Centre together with a cheque of HK$295.00 payable to "The University of Hong Kong". All users ordering the software have to collect the products at Computer Centre when they are available.

Peter Leung 
Tel : 859 2497 
E-mail : 


The University's current financial year will end on June 30, 1994. For any department requisitions on computer related products that have to be submitted through Computer Centre and to be included in the 1993-1994 accounts, we will expect the requisitions to arrive at our Centre on or before June 8, 1994. These include purchases of software licences, diskettes, ribbons, paper and other consumables. Any late submissions will have to be charged to the 1994-1995 accounts.


We are pleased to announce that Computer Centre has recently signed a site licence on Harvard Graphics through UPCC. Harvard Graphics is a well-known graphics presentation software. With the site licence, our users can have a very cost-effective way of employing the software for their teaching and other academic activities.

The new Harvard Graphics for Windows V.2.0 includes a number of outstanding features that will help you to realise effective and impressive presentations, e.g. :

  1. provision of a 5-minute coach and on-line interactive tutorial;
  2. provision of "Quick Tips" and "Design Tips" for on-screen editing and design assistance;
  3. support of customizable icon bar;
  4. support of Harvard F/X (a full drawing application for high-end drawings and illustrations) and 16 levels of undo and redo;
  5. multimedia functions which supports voice, music, animation and video; 6. autobuild text and charts.
Similar features are also available in Harvard Graphics version 3.0 for DOS.

While Computer Centre will provide Harvard Graphics (both the DOS and MS Windows versions) on all PC LANs managed by the Centre, individual departments can also request the software for their departmental use. To recover part of the licence costs, Computer Centre will charge a nominal fee of HK$200 for the use of the software on each PC and will charge HK$10 for each software distribution diskette. Departments requiring the use of the software can send requisition to Computer Centre according to the following schedule :

  Products                              Charge per PC     Diskette Media Set 

  Harvard Graphics for Windows V.2.0       HK$200               HK$100
  Harvard Graphics for DOS V.3.0           HK$200               HK$60   

The following software manuals can be ordered through Computer Centre :

  - Reference Manual for Harvard Graphics V3.0 for DOS      HK$275 
  - Reference Manual for Harvard Graphics V2.0 for Windows  HK$275 

For further information, please contact the undersigned.

Peter Leung 
Tel : 859 2497 
E-mail : 


In the past two years, we have seen the enormous growth of our users' dial-up access requirements which could not be satisfactorily met just by modest addition of modem lines. Hence, we are trying to cope with the great and growing demand by 3 areas of efforts :

  1. provision of additional modem lines,
  2. usage regulation and
  3. equipment enhancement.
We are very pleased to announce that 20 more dial-up modem lines have recently been added to the dial-up facilities. These new lines are operated as a separate modem pool which is accessible by dialing the number 5480590 through the HKUDIAL30 service (please see below for the procedure).

Other than the addition of modem lines, all existing modem lines which are connected through the DataSwitch (D.S.) and accessible by the number 8592595 will also be put under the HKUDIAL30 service on May 15, 1994. This arrangement is to provide a fair chance for all users to gain access to this modem pool and at the same time to unify the user interface for dial-up access to the computer systems of Computer Centre .

With the mentioned addition and re-arrangement of modem lines, there will be three separate modem pools, and a total of 30 24-hour lines and 8 night- service lines. All of the dial-up lines will be connected to the HKUDIAL30 service from May 15, 1994.

Facility Summary : 

  - Three separate modem pools : 

  Access  Number     Operating Time    No. of Lines    Max. Terminal Speed 

  8592595               24-hour             10           19,200 baud
  5480590               24-hour             20           19,200 baud
  8597992             night-service          8           19,200 baud
                     (6 p.m. - 8 a.m. next day) 

  - Modem standards supported : 

   Data link : V.32bis (14,400 bps)   Error correction : V.4
               V.32    (9,600 bps)    Data compression : V.42 bis 
               V.22bis (2,400 bps)    Parity :           none 
               V.22    (1,200 bps)    Data length :      8-bit 
                                      Flow control :     XON/XOFF 
- HKUDIAL30 service : This service will limit a dial-up session to a maximum connection time of 30 minutes (with another 5 minutes of grace period). If the length of a session exceeds the maximum connection time, the session will be disconnected involuntarily. The procedure of dial-up access through the HKUDIAL30 service is as follows:

  1. Ensure that the terminal and modem are set up with the settings given above (parity none and XON/XOFF flow-control must be set).
  2. Dial the number of a modem pool.
  3. When a dial-up connection is successfully made, the user has first to press the "ENTER" key a few times until the "Username:" prompt appears on the screen. After that, the user should enter "HKUDIAL30” to initiate a menu for selecting the system for connection.
Computer Centre is providing a tailored MS-Kermit software for dial-up access to Centre's computer systems. An updated MS-Kermit Installation diskette is now available from Centre's General Office, Room RR-223 or the Laser Printer Counter in Room RR-103 at nominal cost. Users can also borrow from the office the MS-Kermit Installation Package and make their own copies.

For further queries, please contact Mr. Y.W. Cheung (tel:8592488, email:

P.T. Ho
Tel : 859 2491
E-mail :



The latest release of the SAS software, Release 6.09, is now available on the IBM 9076 SP1 (HKUSP1) system. SAS Release 6.09 will co-exist with SAS Release 6.07 on HKUSP1 for parallel service until the end of May 1994. The old version, i.e SAS Release 6.07, will be removed from the system after the parallel service period if the new release is proved to be stable. Users are hence recommended to use the new release as soon as possible.

To run SAS Release 6.09, please type the following command at system prompt :

$ sas609

For the old version, use the following command instead :

$ sas

If you find any problems in using SAS Release 6.09, please report them to the undersigned.

S.L. Lee 
Tel.: 8598936 


Data visualisation is an invaluable tool for realising a data model graphically. We are pleased to announce that the IBM Data Explorer software is now available on HKURSA (an IBM RS/6000 360 workstation in Room RR108).

IBM Data Explorer is an integrated visualization environment with flexible on- line context-sensitive help for new users to get familiar with the various software functions. The software provides a set of visualization modules for data transformation, realisation and rendering. The software allows users to take the advantage of the interactive, iterative and experimental nature of visualization for data analysis. Since IBM Data Explorer supports features of different sophistication levels, non-programmer users as well as expert programmers will find the software a very useful tool. Some suggested use of the software for the different kinds of users are :

Users              Functions

Non-programmer     can make use of exisiting visual programs to examine data
                   sets, change the data as well as save and restore the 
                   program sessions. 
Programmer     	   can build visual programs from built-in modules or use the
                   scripting language to create visualizations. 

Expert programmer  can use C or FORTRAN to develop new modules with 
                   reference to the built-in modules and interface. 
The User Interface of the software works in the X-Window or Motif environment. Hence, access to X-Display, e.g. a workstation console or a X-terminal, is required for using the IBM Visualization Data Explorer software. The Data Explorer Graphical User Interface provides with the following basic features :

1. Executing a Visual Program -
   this can be done directly by invoking "dx  -execute " command.

2. Image Window -

   this window is for controlling view, colour and other aspects of the image 

3. Control Panels -

   this window is used for grouping or constructing control parameters which 
   would cause different effects to the image created 

4. Interactors -

   users can use these interactive graphical input manipulation devices to 
   change input values interactively 

Information of the IBM Data Explorer commands and options can be found by  
issuing the following command:

        %  man dx

Examples of running IBM Data Explorer (assuming access to a  X-Display has 
been set up) :

1 To start the software with the Visual Program Editor, the Image Window and 
the visual program loaded, use : 

	%  dx cfd

2 To start and execute the visual program in image mode, use

	%  dx -image -execute cfd

3 To run just the executive on the script named f15wing:

 	%  dx -script  f15wing
For detailed information about the use of the software, please refer to the following references which can be borrowed from Computer Centre's General Office, Room 223, Run Run Shaw Building :

  1. IBM Visualization Data Explorer User's Guide
  2. IBM Visualization Data Explorer Programmer's Guide
K.T. Wan
Tel : 859 7971
E-mail :



Since its initial service in May 1993, the CWIS has been growing, both in terms of the number of information providers as well as the spectrum of the information available. Three more items have appeared since the end of March this year: (a) Law-On-Line database, (b) Fung Ping Shan Library Chinese OPAC and (c) Supermap on CD-ROM. Features of these new campus-wide information services are highlighted below:

(a) Law-On-Line Database

This service is provided by the Department of Law. The database contains a variety of newspaper clippings, case judgments, treaties and bibliographies relating to human rights and other areas of legal research. The database also contains full texts of Hansard.

The database appears under the "Department of Law" sub-menu of the CWIS menu. As both English and Chinese information are present in the database, it is organised as two items on the CWIS menu :

 Law-On-Line Database (English)
 Law-On-Line Database (Chinese)
If viewing information in Chinese is required, the user must select the "Law- On-Line Database (Chinese)" menu item. This Chinese part of the database includes all the information provided under 'Chinese Law Database' and some 80% of data under 'HK (CSCO) Newspaper clippings Indexes Database'.

The operations for retrieving information from the database are menu-driven. On choosing the Law-On-Line database on the CWIS menu, a connection will be made to the UNIX machine run by the Department of Law containing the database. At present, the database is set up to be accessible by an account named hkulaw, with no password protection. You will therefore be instructed to type hkulaw, at the login prompt, and simply hit the Enter key at the password prompt. A screen will come up requesting you to select one of the monitor types that you have (a colour monitor is recommended), after which you will be presented with a self-explanatory menu containing different categories of information provided by the database.

With the Chinese version of the database, a Kuo-Chia Chinese system (with ETEN emulation) is first loaded before connection is made to the database machine. Key operations are the same as those under the ETEN Chinese system. For example, Chinese input and display are available on switching to the types of input methods other than the default mode (English & Numerical) by toggling the key-combination Shift-Ctrl.

(b) Fung Ping Shan Library Chinese OPAC

The Fung Ping Shan Library Chinese OPAC which could only be accessible previously inside the Libraries is now converted to a network-accessible form. It is now accessible from the “University Libraries” sub-menu of the CWIS menu.

When the "Fung Ping Shan Library OPAC" menu item on the screen is selected, a Chinese menu for the OPAC retrieval will be displayed on the screen. For further operation of the Chinese OPAC, knowledge of Changjei Chinese input method is required. To return from the OPAC system to the CWIS menu screen, you have to press the F3 key.

The minimum hardware requirement for using this Chinese OPAC service is a 386 PC with 4MB and a VGA monitor. The most common problems found in using this system are related to "insufficient free memory" for loading the programs. Under such circumstances, you have to reclaim more free conventional memory by removing some of the TSR programs or loading them at high memory by using the LOADHIGH command.

If you encounter any problems in gaining access to the Fung Ping Shan Chinese OPAC system, please contact Mr. Peter Leung, tel: 8592497, email :

(c) Supermap on CD-ROM

"Supermap Hong Kong 1991" is a database on CD-ROM which include the 1991 Population Census data and the summaries of the 1981 Population Census and the 1986 Population By-Census. This database is accessible from the "Computer Centre " sub-menu of the CWIS menu. When this service is invoked, a Microsoft Windows, with the Supermap icon, will first be loaded. Clicking the Supermap icon in turn reveals more items available from the database. Full on-line help is available under the Help item on the menu-bar and the Data Guide icon.

To use the database, your machine must have a VGA colour monitor. A Microsoft-compatible mouse is also required. For acceptable performance under MS Windows, a 386 or above PC with a minimum of 4MB RAM is recommended. A minimum of 100 KB of free disk space on drive C is also essential for storing temporary files that are generated by the data retrieval programs. For more information about Supermap, please refer to the companion article "Supermap Hong Kong 1991" below.

T.Y. Shen
Tel : 8592482
E-mail :


As described in the above article "New Services on Campus-Wide Information Service", a population census database named "Supermap Hong Kong 1991" is now accessible over the campus network. While the procedure for accessing the database is discussed in that article, a closer look of the database itself is presented below :

The entire Supermap database is stored on a CD-ROM. It includes the detailed information on the 1991 Population Census, a summary of the 1981 Population Census, as well as a summary of the 1986 Population by-Census. The data provided in the database refers to the enumerated resident population of the whole land territory in Hong Kong. This means that those residents who were temporarily away from Hong Kong during the Census period, Vietnamese migrants and marine residents living on board of vessels had not been included in the data.

The "Supermap Hong Kong 1991" database provides two systems of geographical breakdown of the territory. They are (a) the District Board District and Constituency Area System and (b) the Tertiary Planning Unit and Street Block System. The division of the territory according to these two systems are summarised below:

(a) District Board District and Constituency Area System

                       	District Board   Constituency Area
Hong Kong Island                4               39
Kowloon & New Kowloon           6               69
New Territories	                9              102 

Total                          19              210
(b) Tertiary Planning Unit and Street Block System

Hong Kong is divided into 274 Tertiary Planning Units (TPU) in Hong Kong Island, Kowloon, New Kowloon, and new towns and their adjacent areas in the New Territories. Each TPU is delineated into smaller sub-units which are called Street Blocks.

The Census data are presented in seven geographical groupings in order to safeguard the confidentiality of information and the reliability of data based on sample estimates. The seven geographical groups are :

(a) Small Street Block Group
(b) Large Street Block Group
(c) Small Tertiary Planning Unit Group
(d) Large Tertiary Planning Unit Group
(e) Constituency Area
(f) Large Constituency Area Group
(g) District Board District
Users who require more information on SUPERMAP database are recommended to read the online "Database Guide" within a SUPERMAP session or refer to the manual "SUPERMAP HONG KONG 1991 - Users Guide" which can be borrowed from Centre's General Office, Room 223, Run Run Shaw Building.

Should any problems in using the "Supermap Hong Kong 1991" be encountered, please report them to the undersigned.

S.L. Lee
Tel.: 8598936

User Services Group, Computer Centre , the University of Hong Kong