History of Personal Computer

YearName of Computer FunctionsCPURAM/storageDisplay/OutputOS
Simon 1 relay logic machine.agr.jpg
Intended for the educational purpose of demonstrating the concept of digital computer2 bits arithmetic logic unit (ALU)12bits5 lams
1957IBM 610
It was designed to be used in a normal office. vacuum tube logic circuitryPunched paper tapeIBM electric typewriter,
1957Olivetti Elea 9003
first solid-state computer-being able to manage three programs at the same time7 bits
1965Olivetti Programma 101
Olivetti Programma 101 - Museo scienza e tecnologia Milano.jpg
a printing programmable calculator or desktop calculator.This is the first personal computer in the world sold as a functioning pre-assembled system with a built-in floppy disk reader.ould execute 8000-10000 instructions per second240 bytesSelf printed
1968Hewlett-Packard 9100A
The 9100A was the first scientific calculator or Personal computer of that time in modern definitions such as triangular , logarithmic , and exponential functions . The HP 9100 is a personal computer .The machine incorporates several technologies from Olivetti Programma 101 , including magnetic cards and architecture.Built-in display Three-line CRT
1970Datapoint 2200
Resemblance to the modern personal computer, with a CRT screen, keyboard, programmability, and program storagediscrete logic implementation of the Intel 8008 instruction set2 KB standard; expandable to 16 KBText only Display, 80×12 characters
Kenbak-1 worked had no monitor, no keyboard, no mouse or disk drive but its low price was affordable. 8-bit machine offered 256 bytes of memory