The Mark-8 Minicomputer was the worlds first widely available personal computer. Introduced in the July 1974 issue of Radio Electronics. What made it even more personal is that you had to build it yourself!
 

Among the earliest of all companies to offer a personal computer, the digital group began in August '74, initially  to support the Mark-8. They were among the first to offer users a "warm boot" from built-in ROM.
 

After the introduction of the Mark-8, the digital group was formed to sell improvement information and add-on's to the Mark-8. This video card was their first product.
 

The most common input/output device of the minicomputer and early microcomputer era was the ASR-33 Teletype. This version included a keyboard and papertape reader/punch. The machine communicated via serial interface at 110 baud, or ten characters per second.
 

The first batch of 6502 processors had flaws that made some functions unusable. Mine is one of these early versions. (Remember the early "math challenged" Pentium chips?)
 

Apple-1 replica, and my own homebrew Apple-1, built in 1977 from plans drawn by Steve Wozniak. The Apple 1 is widely considered the most collectable of all old computers.
 

The Kenbak-1 was named the first PC by the computer history museum Apparently, they never heard of Simon. This my replica construction page.
(Tiny photo stolen from Erik Klein :)
 

The first "clone" computer. This was the industrial looking Altair clone with beefier power supply. A gift from Tom Apel, thanks Tom!!
 

The VCF takes place each year in Mountain View, CA, (near San Francisco) at the Computer History Museum. What fun!
 

The next advancement in I/O after the teletype was the video terminal or  "silent teletype". The most popular of the early microprocessor era was the Lear Siegler ADM-3, and later the 3A, which was nearly a direct replacement for the ASR-33 Teletype (less tape punch/reader), but added many new features. It even offered lower case(!) characters as an option! Wow!