An interview with her husband, Peter Dobson who was a "computer analyst" at the time in Joburg: https://disa.ukzn.ac.za/sites/default/files/pdf_files/sedec8... (pg. 21)
(this is an ANC publication from 1989)
It deals with American and Japanese tacit support of the regime (despite US sanctions on "computer technology" being sold to the ZA government) and the types of (IBM) systems running at the time.