Them missing the shift to software wasn't for lack of trying. They had lots of mainframe software, and then had a huge division making PC applications software

Them missing the shift to software wasn't for lack of trying. They had lots of mainframe software, and then had a huge division making PC applications software in the eighties, which no one much liked. Then they made a major push with OS/2 and forked DOS from Microsoft, and bought Lotus. Unfortunately for them, for some reason IBM didn't seem to be able to make mainstream software that people wanted to buy.