Mostly the machines got smaller and more reliable as transistors replaced vacuum tubes.
second generation
The first second generation computers came on the market in 1958.
The Second Generation Computer used transistors
Second generation
Transistorized computers.
yes
in second generation of computer transistor were used transistor are used instead of vaccum tube are used in first generation high level langauges such as gobsl, fortran are used
1956-1963
transistors
Second generation computers used electronic transistors. A small number used magnetic amplifiers.
Colossus Mark II, an improvement on Colossus Mark I which was designed to crack the Germans' code during WWII in 1943/1944.
No specific person, there were many projects in the 1950s to transistorize the computer.