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Welby Computer Services Limited was a computer service bureau which specialised in providing data processing for insurance agents.

Welby was started as Welby Services in the 1950's, as a subsidurary of the accounting firm of George A. Welch and Company.

In the early 1970's, Welby had 2 offices, one in Ottawa at 306 Metcalfe St and one in Montreal at 4333 Rue Ste-Catherine O, Westmount.

In 1971, both offices had UNIVAC 1050 computers. These were considered out of date even then. They had 24K core memory using a 6 bit byte, They had 4 reel to reel tape drives (no hard disk drives) and an impact line printer. There were no consoles, the computers were controlled using a panel of toggle switches and lights. The computers were programmed using the PAL assembly language.

In 1977, Real Time Datapro acquired Welby. Real Time Datapro, in turn, was aquired by Memotec Data Incorporated in December 1985.