Explanation

• Email was first introduced by Ray Tomlinson.
  • Email is a digital message sent from an author to one or more recipients.
  • Ray Tomlinson sent the first e-mail message as QWERTYUIOP in 1971.
  • Unwanted emails received in a folder is called Spam.
  • Gmail is a famous email service provided by Google.
  • The latest email systems technologies are based on a store-and-forward model.
• Charles Babbage is considered the "father of the computer".
• Antonio Meucci developed a voice-communication apparatus that several sources credit as the first telephone.

Explanation

Vinton Gray Cerf, born on June 23, 1943.

He is an American Internet pioneer known as the "Father of the Internet."

In 1997, President Bill Clinton awarded him the U.S. National Medal of Technology.

Explanation

Charles Babbage is known as the Father of the Computer.

He was an inventor from the UK.

He was born in 1791.

He was died in 1871.

Explanation

Keyboard is an input device.

Keyboard is similar to electric typewriter.

Keyboard uses serial port to connect with computer.

Keys on keyboard are of mainly three types:

Alphanumeric keys: letters and numbers 

Punctuation keys: comma, period, semicolon, etc.

Special keys: function keys, arrow keys, caps lock key, etc. 
Keyboard inventor: Christopher Latham 

Smallest key on keyboard: Space key

Explanation

Abacus was the first mechanical calculator

Abacus was invented by Tim Cranmer.

Abacus was invented in 1962.