Was the computer invented in 1984?

Answer 1

No.

Charles Babbage invented the programmable digital computer in the 1830s but could never get funding to build it, the machine was all mechanical and powered by a steam engine.

Alan Turing invented the digital computer with a program stored in memory in 1936 but only described it in his paper "On Computable Numbers" as a part of a mathematical proof, he never intended on building it.

John Vincent Atanasoff invented the first electronic digital computer in 1936 and finished building it in 1942 just before having to leave for war work. However it was not programmable.

Tommy Flowers invented the first programmable electronic digital computer in late 1943 to help Bletchley Park crack German High Command cypher messages. The first of 10 of these computers was completed just before D-Day in time to contribute significantly to the success of the invasion.

Many other computers (both analog and digital, both programmable and nonprogrammable) were invented between the 1830s and the 1960s.

All modern computers are derivatives of inventions that predate 1960. Microcomputers are simply an invention (done in 1971) that greatly increased miniaturization and reduced the cost of computers based on existing concepts.