ucstickpeople.gif (11784 bytes)

1991-2000 Point of Sales System (POS)crs01.JPG (6012 bytes)


polling loop




Snooker Centre

PC POS terminal




Hand-held scanners


Import from LOTUS


Management reports


Null modem cabling consolidation








Wide Area Networking

The Point of Sales System is part of an extensive research project involving a complete Wide Area Networking System using Cash Registers, Personal Computers, Dialup Modems, Bar Code Scanners and Printers. The data is stored in a C relational database system.

The project was first developed from software techniques implemented in the BERNAMA News System, using a polling loop.

The Point of Sales System was first implemented in a Bakery. It was our first experiment in PC Point of Sales Systems. There were many bugs in the system.

The next deployment was successfully implemented at the G2000 and U2 stores, which are clothing boutique outlets. This project involved using the polling loop to read the bar code scanners as a RS-232 output device.

The POS Terminal registers sales as scanned in at the outlet.

The POS Management System (POSMS) involves printing bar codes as a serial input device.

Further work involved reading inputs from hand-held bar code Scanner devices as serial file output devices. The POSMS has a feature to import the file as a serial stream, and update the Stock file.

Other import features include reading the exported file from LOTUS 123 worksheets, and updating the Stock.

The management reports involve parsing the bar code for season, style, color, and size.

Sales Data from each terminal is first consolidated at the outlets using diskettes and RS-232 null modem cabling. (There were only a maximum of two terminals in each outlet)

The consolidated data was sent by modem to the Headquarters using PC Anywhere.

At the Headquarters, the data from each outlet was consolidated, to produce various sales management reports.

Later a Warehouse Terminal was added at the Warehouse. This Warehouse Terminal is a modified PC POS terminal, that reads barcode scanners for goods received, and goods sent to the outlets. The data was sent by modem to outlets and HQ.

In 1995, the POS Sales System was implemented at Tiffin Bakery, which had 12 outlets throughout the country.

A Modem dialup system was developed to enable daily real-time update of sales from each outlet. This forms the basis of the Wide Area Networking scheme.

POSWAN01.jpg (12620 bytes)

TFNKotaRaya02.jpg (14539 bytes)

An outlet at Kota Raya using our PCPOS (1998)



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Copyright 2000 Discovery Science Centre
Last modified: August 23, 2001