History of computers

History of computers :

The history of computers shows how machines developed from simple calculating tools into powerful modern systems.

🔹 Early Calculating Devices:

1. Abacus (around 3000 BC)

First calculating device

Used for basic arithmetic

Still used in some countries

2. Napier’s Bones (1617)

Invented by John Napier

Used for multiplication and division

3. Pascaline (1642)

Invented by Blaise Pascal

Mechanical calculator for addition and subtraction

4. Leibniz Calculator (1671)

Invented by Gottfried Wilhelm Leibniz

Performed multiplication and division

🔹 Mechanical & Analytical Machines

5. Difference Engine (1822)

Invented by Charles babbage

Used to calculate mathematical tables

6. Analytical Engine (1837)

Also designed by Charles Babbage

Considered the first modern computer

Used input, output, memory, and processing

Ada Lovelace wrote the first computer program

🔹 Electro-Mechanical Computers

7. Mark I (1944)

Developed by Howard Aiken

Used electromechanical relays

Large and slow