Novell
Sterling Software was created in 1980.
Custom written software is software which is written for one specific occasion. It may be that a researcher needs to do a lot of complex calculations. If they go out and buy a copy of Mathematica, then they're using mainstream software. However, if they decide to write their own program to do it, then they have a piece of custom written software.
HTML was created in the 1980's, but its graphic interface MOSAIC was created in 1992.. so in 1992...probably.. :)
BE Aerospace consists of several acquired businesses and a lot of internally grown businesses. The first two acquisitions, in the late 1980's, were (a division of) Eeco and a company called Bach. The initials were combined to be BE Avionics. (Avionics is a word formed by combining Aviation and electronics, and has been in general use since the 1950's.) That is also why the company's stock symbol is BEAV. BE Avionics products were almost all electronics products for passenger entertainment systems. In the early 1990's, the "Avionics" was changed to "Aerospace" when the company diversified into many non-electronics product lines. And the passenger entertainment business was sold to a French company, Thales.
In the 1980's.
Novell
IntelliCorp - software - was created in 1980.
Rediker Software was created in 1980.
Serena Software was created in 1980.
Sterling Software was created in 1980.
BMC Software was created in 1980-09.
The Learning Company was founded in 1980.
Abas Business Software was created in 1980.
Central Point Software was created in 1980.
Software Publishing Corporation was created in 1980-04.
Lag - company - was created in 1980.
Saudi Investment Company was created in 1980.