Roughly 1958, when IBM introduced their 7090 scientific computer.
second generation
Transistorized computers varied in size, the smallest being about the size of an office desk, the largest took up most of a room.
2ng generation. It used transistors and magnetic core memory
Varied widely depending on requirements of the computer.The IBM 1620 a small scientific computer had from 1500 to 5000 transistors in the CPU depending on options included.The IBM 1401 a small business computer had about 10000 transistors in its CPU.The IBM 7030 Stretch a supercomputer had about 170000 transistors.The CDC 6600 a supercomputer had about 384000 transistors.The CDC 7600 a supercomputer had about 2900000 transistors.You can compare this to first generation computers, the largest of which the IBM AN/FSQ-7 had about 50000 vacuum tubes.You can compare this to modern multicore microprocessor based computers, a typical one of which has a couple hundred billion transistors per processor core integrated on one chip.
ibm360
OS/2 is a computer operating system, initially created by Microsoft and IBM, then later developed by IBM exclusively. The name stands for "Operating System/2," because it was introduced as part of the same generation change release as IBM's "Personal System/2 (PS/2)" line of second-generation personal computers.
the invention of transistor in 1947 provided a substitute for vacuum tubes in the second generation of computers. computers of this period all used magnetic-core storage systems for memory. -IBM 410 -Honeywell 800
First Generation (1940-1956) Vacuum Tubes Second Generation (1956-1963) Transistors Third Generation (1964-1971) Integrated Circuits Fourth Generation (1971-Present) Microprocessors Fifth Generation (Present and Beyond) Artificial Intelligence The link below has a nice explanation of the generations
The first and second games were both won by Watson the IBM computer
It varied, most executed a few thousand instructions per second to a few tens of thousands of instructions per second. By the end of the first generation, high end machines like the IBM 709 and UNIVAC 1105 could do a few hundred thousand instructions per second.
The games were won by Watson The IBM computer Ken Jennings was second and Brad Rutter was third