In terms of 1995 turnover, IBM was by far the biggest IT company ($71.95 billion) and it was trying hard to kill Microsoft. IBM was followed by HP ($31.52bn), Intel ($16.2bn), Apple ($11.06bn) and then Microsoft ($5.09bn). Sun was bigger as well, but I can't turn up a number.

Google's turnover for 2012 was $50.18bn, so Google is 10x the size now that Microsoft was then. And it's much more powerful.