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Computers by Mind Map: Computers

1. Old computers were very big in the 1940’s and 1960’s. But they don't do the same things as computers we have today, some had names to represent their size like colossus, whirlwind, and Pegasus. Most big old computers were made only for math problems. But they did have a lot of memory. The size they were was enough to cover the walls of a class room

2. the first PC had huge impact in 1975 and was called the IBM PC and was the first PC it had a big impact because it was the first computer that can do other things other than only solving math problems

3. the first laptop was invented by Adam Osborne in 1981, it was called Osborne 1 and was priced at $1795 it came with $1500 worth of programs but had a tiny screen on it. it was a success with sales reaching 10,000 units a month.