Waterloo Structured BASIC
Waterloo Structural BASIC [sic] was a utility cartridge for the VIC-20 providing an extended form of the BASIC programming language. The cartridge was manufactured & sold by Commodore Business Machines in Canada (and possibly only in Canada). Confusingly, CBM Canada chose the product number VIC-1001, which was a number already in use for the VIC-20 as sold in Japan.
The cartridge was actually meant to be called "Waterloo Structured BASIC. This is the proper name of the language, the name shown by the cartridge upon startup and the name printed on the manual. However, the cartridge label was mis-printed.
Waterloo Structural BASIC was developed as a programming language by the University of Waterloo in Ontario, Canada. The Computer Science department of this University had previously developed the SuperPET computer with Commodore in Canada. The SuperPET contained used the programming language Waterloo Structured BASIC (among others).
These cartridges seem to have been produced in low quantity (burned onto EPROMS and packed in generic brown utility cartridge boxes with stick labels). The cartridge was not known or even suspected to exist by the majority of VIC-20 users and collectors until 2006, when the ROM image was finally archived by a DENIAL forum member.
