Nintendo should probably be on that list with EA & Activision as well. The only reason they still exist is due to their consumer software business. They've shipped an enormous amount of consumer software.
Microsoft hasn't been a pure-play software company in a very long time. So I would also include Apple and IBM on that list, as both have shipped huge volumes of consumer software at various points (Apple is both still alive and still ships consumer software; IBM still exists, but no longer ships consumer software).
Adobe (1982), Intuit (1983), Electronic Arts (1982), Activision (1979), Symantec (1982), McAfee (1987)
Nintendo should probably be on that list with EA & Activision as well. The only reason they still exist is due to their consumer software business. They've shipped an enormous amount of consumer software.
Microsoft hasn't been a pure-play software company in a very long time. So I would also include Apple and IBM on that list, as both have shipped huge volumes of consumer software at various points (Apple is both still alive and still ships consumer software; IBM still exists, but no longer ships consumer software).