I had to chuckle at this > I can't believe it fits in 10M. Back when troff was drilled into my fingers, it fit in 64K program space plus 64K data space. Each preprocessor got a similar allotment. Roff, the predecessor of troff, fit in 8K total. Some features have been added since, but in nothing like a ratio of 10,000:1 in utility.
Doug McIlroy
