basis24.zip   Comprehensive Land Surveying Computations
tierra31.zip  Tierra world creator/simulator v3.1, w/source
usa_surv.zip  Survey the USA, graphics, requires mouse
usgeo102.zip  USA geography teacher & tester (req. EGA/VGA)
vnmyhome.zip  Geography of Vietnam, in English
vnquetoi.zip  Geography of Vietnam, in Vietnamese