Recent estimates peg the Microsoft Office suite of productivity tools holding over 90% market share in this category of software. Microsoft Excel was the first application that was developed by Microsoft for the Windows operating system. It was first released in 1987, and has gone on to become the best-selling spreadsheet application of all time. Microsoft office is a software bundle that is a must have for any business working with word processing tools and spreadsheets.
There really is no competition in the office software market. Microsoft has been on top of it since the inception of microsoft office in the early 90's. A main selling point of microsoft office is that you can buy everything in a bundled format, rather than having to shop for each application one by one. This was and remains to be a huge part of microsoft offices success.