When I was in library school, I had the good fortune of being introduced to the idea of intellectual freedom—and delight in the field in general—by the former dean, a wonderfully eccentric gentleman who was once dubbed the "most verbose" library science professor in the country. One day in class he expressed his reservations about microforms in the following fragment (with implied apologies to Edgar Allan Poe):
Microforms are akin to a midden
And have their ghastly origins
In the rank miasma of the tarn.
The Ballard list includes Micorf* in its "highest probability" section; Micoform, Micrform, and Microfom in its "high probability" section; Micoro*, Microfirm, Microforn, and Mocrofirm in its "moderate probability" section; and quite a few other tiny-related typos wafting their way through the rest of the list. (Note that some of these could mean either microform or microfilm.) Wipe out one or two each day so you don't get swamped.