KB-9 or MOS TECH 6502 BASIC V1.1, a 9 digit BASIC for the KIM-1 The same BASIC as in the first PET , OSI, Applesoft. One of the first products of MICRO-SOFT as it was called then. Telephone support was given by Bill Gates and Paul Allen! Updated, improved and enhanced information and downloads at: http://retro.hansotten.nl/6502-sbc/kim-1-manuals-and-software/kim-1-software/microsoft-kb-9-basic/