• The first computer mouse was made of wood. Douglas Engelbart, who invented the mouse in 1963,  built it out of wood because it was cheap and easy to work with.



  • The first computer virus was created by a 15-year-old. In 1986, a 15-year-old named Basit Farooq Alvi and his brother Amjad Farooq Alvi wrote the Brain virus, which infected computers running the DOS operating system.


    • The world's oldest computer is still in use. The Harvard Mark I, also known as the IBM Automatic Sequence Controlled Calculator, was built in 1937 and is still used for research purposes at Harvard University.




    • The first computer game was played on a computer the size of a room. In 1958, William Higinbotham created a game called Tennis for Two, which was played on an oscilloscope and displayed on a screen the size of a small room.



    • A computer error caused a nuclear missile scare. In 1979, a computer glitch led to a false alarm that the Soviet Union had launched a nuclear missile at the United States. The incident, known as the "Norad incident," caused panic among military officials and civilians alike.



    • The first computer animation was created in 1957. The first computer animation was created by Alexander Schure, the founder of New York Institute of Technology, and was called "Futureworld."



    • The first computer virus to spread via the internet was the Morris Worm. In 1988, a graduate student named Robert Tappan Morris created the Morris Worm, which infected thousands of computers and caused widespread panic.

    • The first computer virus for Apple Macintosh was called "Elk Cloner." In 1982, a high school student named Rich Skrenta created the Elk Cloner virus, which infected Apple Macintosh computers and was spread via floppy disks.


    • The first computer virus for Android was called "DroidDream." In 2011, a virus called DroidDream infected Android devices and was spread through third-party app stores.



    • The first computer to be sold commercially was the UNIVAC. In 1951, the UNIVAC (Universal Automatic Computer) was sold to the U.S. Census Bureau for $1 million, making it the first computer to be sold commercially.