The BASIC programming language as it was in 1978.
READY. 10 FOR I=1 TO 2 20 PRINT "Hello World" 30 NEXT I RUN Hello World Hello World READY.
Future versions of BASIC introduced structure and required or included a text editor. This project is a historical preservation of BASIC just before then. A time when most people were learning about computers by typing in BASIC programs published in books and magazines.
The first computer book to sell one million copies was a collection of BASIC Computer Games. It was followed up with More BASIC Computer Games. You can run all those and more with this dialect of BASIC.