1940s
digital computers were first used in 1942 analog computers were first used in about 100BC
First generation computers.
Mainframe computers first used star topology
1940s
Electro-Mechanical Computers were used before first generation of computers.
Basic math computations.
NASA
The first minicomputers were second generation computers, but the most well known minicomputers were third generation computers.
FIRST GENERATION
Tape
first generation computers
vacuum tubes