Evolution of computer

1. The first computers were very large and expensive machines that were used mainly by governments and large businesses. They were called "mainframe computers."
   
2. In the 1970s, personal computers (PCs) were introduced. These were smaller and more affordable computers that individuals could use in their homes or offices.
   
3. In the 1980s, laptops were introduced. These were portable computers that could be carried around and used on the go.
   
4. In the 1990s, the internet became widely available, which revolutionized the way we use computers. We could now connect to the internet from our computers and access a vast amount of information.
5. In the 2000s, smartphones were introduced. These were small, portable devices that could make phone calls, send text messages, and access the internet.
6. Today, computers are an integral part of our daily lives. We use them for a wide variety of tasks, including communication, entertainment, work, and education.

 

Abacus: An abacus is an ancient tool used for basic arithmetic calculations. It consists of a wooden frame with beads that can be moved up and down on wires.
 

Napier's Bone: Napier's Bone is a device invented in the early 17th century by John Napier for calculating multiplication and division. It consists of a set of rods with numbers inscribed on them.
 

Pascaline: The Pascaline is an early mechanical calculator invented by Blaise Pascal in the 17th century. It could perform addition and subtraction using a system of cogs and gears.
 

Jacquard Loom: The Jacquard Loom is a type of mechanical loom invented in the early 19th century that could produce intricate patterns in textiles. It used punched cards to control the pattern of the weave.
 

Difference Engine: The Difference Engine is an early mechanical calculator designed by Charles Babbage in the 19th century. It could perform complex mathematical calculations using a system of cogs and gears.
 

Analytical Engine: The Analytical Engine was an early mechanical computer designed by Charles Babbage in the 19th century. It was the first machine that could be considered a general-purpose computer.
 

Mark I: The Mark I was an early electromechanical computer built in the 1940s at Harvard University. It was used for scientific and military calculations.