So, Scelbi is one of the first ever personal computers that was made a long, long time ago. It was built by a guy named Nat Wadsworth in 1974, when personal computers were not really a thing yet.
Scelbi used a microprocessor- a tiny chip of silicon- to do all the calculations and run programs. Basically, it was like having a tiny brain inside the computer! The microprocessor was called the 8008 and it was very powerful for its time.
The Scelbi computer had some buttons and switches on the front, kind of like a calculator, and you had to know how to use them to make it work. There was no mouse or keyboard like we have on our computers now.
People who used Scelbi had to write their own programs, which meant they had to type in a special code that the computer understood. It was kind of like learning a new language!
Overall, Scelbi was a very important computer because it was one of the first personal computers ever made, and paved the way for computers that we use today.