Question

______ Is the earliest device that qualifies as a digital computer.
1. Calculator
2. Keyboard
3. Abacus
4. CPU
5.

Answer 1

Correct Answer - Option 1 : Calculator

The correct answer is Calculator.

• The calculator is the earliest device that qualifies as a digital computer.

• Compute is a word derived from a calculator.
  • The first computer ever made was to perform the basic numeric calculation.
  • An electronic calculator is typically a portable electronic device used to perform calculations, ranging from basic arithmetic to complex mathematics. 
  • The first solid-state electronic calculator was created in the early 1960s.
  • Pocket-sized devices became available in the 1970s, especially after the Intel 4004, the first microprocessor, was developed by Intel for the Japanese calculator company Busicom.
  • They later became used commonly within the petroleum industry (oil and gas).

• A computer keyboard is an input device used to enter characters and functions into the computer system by pressing buttons, or keys. It is the primary device used to enter text. A keyboard typically contains keys for individual letters, numbers, and special characters, as well as keys for specific functions. 
• The standard abacus can be used to perform addition, subtraction, division, and multiplication; the abacus can also be used to extract square roots and cubic roots. The beads are manipulated with either the index finger or the thumb of one hand.
• The central processing unit (CPU), also called a central processor, main processor, or just processor is the electronic circuitry that executes instructions comprising a computer program.
  • The CPU performs basic arithmetic, logic, controlling, and input/output (I/O) operations specified by the instructions in the program.