This program is based, and includes source code, of Texas Instrument's
PC-Scheme 3.03 (1988). PCS/GE is the most performant Scheme interpreter
for MS-DOS based low-cost 16 bit microcomputers from the iAPX 86,88 series;
it also runs on 386/486 computers, but is not as performant as
other systems which use specific enhanced hardware
capabilities, even if PCS/GE needs indeed much less memory.
Subsections