________ computers are usally single user computer.

Tabulating Machine was invented by

A computer in which numerical data are represented by measurable physical variable called

___________was an electro-mechanical computer.

____ was the first computer using vaccum tubes.

_______ was the first programmable , electro mechanical calculator.

In the year 1946 John Mauchly and J. presper Eckert  designed the first general purpose electronic computer

_________ Computer is a computer that performs calculations and logical operations with quantities represented as digits.

In 1981 IBM made the first fully portable computer named

__________ computers are large computers with fast processing speed and access to billions of items of data.