IMSAI 8080
The computer had an Intel 8080 CPU and an S-100 bus, copied from the Altair 8800.
Later versions were equipped with a 3 MHz Intel 8085 CPU.
Technical specifications of computer IMSAI 8080
Manufactured by: IMSAI
Launched: 1975
Units shipped: 20 000
Manufactured in 
USA
CPU: Intel 8080
@ 2MHz
Memory: 256 B
Hard drive:
None
Operating system: CP/M
Innovations: It was the first computer that we can consider a clone since it was fully compatible with the Altair 8800, which was older.
In October 1975, an advertisement for the computer was placed in Popular Electronics magazine, which was very well received by electronics hobbyists.
IMS shipped the first IMSAI 8080 kits on December 16, 1975, before moving to fully assembled units.
In 1977, IMSAI marketing director Seymour I. Rubinstein paid Gary Kildall $25,000 for the right to run CP/M version 1.3, which eventually became an operating system called IMDOS. Other manufacturers followed, and CP/M eventually became the de facto standard operating system for 8-bit computers.
