Giving aid and comfort to its Sun Microsystems Inc and Oracle Corp critics, Microsoft Corp estimates 70% of Word users never touch its more advanced features and 85% never use its ‘solutions features’ like embedding live Excel spreadsheets into text documents. It is a mere curiosity since in future it will all be built as objects. Redmond is using the findings as a guide to how much to build into the core feature set, which uses about 4.5Mb of RAM and eats 9Mb of drive space. Features not in the core set may not even have to be installed on corporate desktops. Instead they would be downloaded from a corporate server as required.