Paul Allen flies from Harvard to Albuquerque,
New Mexico, to meet with Ed Roberts at MITS, to demonstrate the
newly written BASIC interpreter for the Altair. Paul writes a
paper tape reader on the plane trip, for the Altair to load the
BASIC software. At MITS, Paul enters the loader, the Altair reads
the paper tape, and is ready to execute BASIC instructions. Despite
never having touched an Altair before, the BASIC works flawlessly.
Paul types "PRINT 2 + 2", and the Altair responds "4".
Paul then types in the BASIC source code for a Lunar Lander game
from a book. This becomes the first sofware program ever run on
what would later become MS BASIC.