FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -A vacuum-tube computer, now termed a first-generation computer, is a computer that uses vacuum tubes for logic circuitry.

Detailed explanation-2: -The first generation of electronic computers used vacuum tubes, which generated large amounts of heat, were bulky and unreliable. A second-generation computer, through the late 1950s and 1960s featured circuit boards filled with individual transistors and magnetic core memory.

Detailed explanation-3: -The first operating system used for real work was GM-NAA I/O, produced in 1956 by General Motors’ Research division for its IBM 704. Most other early operating systems for IBM mainframes were also produced by customers.

Detailed explanation-4: -First Generation of Computer (1943-1959) Second Generation of Computer Transistors (1956-1963) Third Generation of Computer Integrated Circuits (1964-1971) Fourth Generation of Computer 1971 to Present.