TIPS FOR BEGINNERS

Files on the Model T family of computers use a 6.3 naming convention similiar to MS-DOS's 8.3 convention. .DO is an ASCII text file, even if it is file of BASIC code. .BA files are "tokenised" BASIC files ready to be directly loaded and executed. To load and run a .DO file made up of BASIC code, one goes into the BASIC interpreter and enters
LOAD"PROG
with or without the .DO, and no close quote is neccessary. The program can then be RUN. To save it as a BASIC program, type
SAVE"PROG
with or without the .BA or a close quote. 
BASIC commands can be typed in upper or lower case, they are presented here in upper case for clarity. 
Clicking on the file name will load a preview of it in another window.