>           During the last half of 1971, we supported three typists
>     from the Patent department, who spent the day busily typing,
>     editing, and formatting patent applications[*], and meanwhile
>     tried to carry on our own work. Unix has a reputation for
>     supplying interesting services on modest hard- ware, and this
>     period may mark a high point in the benefit/equipment ratio; on
>     a machine with no memory protection and a single .5 MB disk,
>     every test of a new program required care and boldness, because
>     it could easily crash the system, and every few hours' work by
>     the typists meant pushing out more information onto DECtape,
>     because of the very small disk.