This is an original 1978 5.25-inch floppy disk containing the 16K Extended BASIC software for Cromemco microcomputer systems. Published by Cromemco, Inc., this software was a premier high-level programming language designed to leverage the power of the Z80 microprocessor, offering 14-digit floating-point precision and advanced file-handling capabilities. The diskette features the original handwritten or typed label with Serial Number R11098 and is preserved in its original protective paper sleeve.

Manufacturer: Cromemco, Inc.

Condition: Used (Vintage 5.25" diskette in original sleeve; see pictures for true condition and magnetic surface integrity)

Model Number: FDB-S (Cromemco Part Number for 5" BASIC) / Serial R11098

Extra Notes: Cromemco, founded by Stanford's Harry Garland and Roger Melen, was a titan of the S-100 bus era. Their "System Three" (released in 1978) was a professional-grade powerhouse, and this 16K Extended BASIC was the software that allowed it to perform complex business and scientific calculations. Finding original 5.25" media from this transition period—when the industry was moving from 8" to 5.25" drives—is quite rare, especially with a traceable serial number from the company's peak Mountain View, California years.

Manufactured In: USA