McGraw Hill publishes a business program for the Spectrum called Projector 1, which is good for displaying data in the form of graphs; however, potential users should be wanred that, although it is described on the cover as 'Microdrive compatible', they should not imagine that the program can be put on Microdrive. It takes five minutes to load the program from cassette. Only the data can be stored on Microdrive.
I think this term 'Microdrive compatible' should be used only where the program itself can be loaded from Microdrive. This is especially true of business programs. Who wants to have to load an important presentation from cassette, waiting five or more minutes?
Other important practical programs for the Spectrum - Tasword and Masterfile - can be loaded from Microdrive, and I regard these as genuinely compatible.