TO DO: A summary of what it does
Implemented by: decbasic, Applesoft, TI994, CBM, Atari, msatari, trs80, trscolor, colormc, GWBASIC, MSX, bwbasic, bw32, ABasiC, FreeBASIC, Gambas, ugBASIC, minibasicjs
With variations: dartmouth4 X* (ON GO TO)
Also written as: