Year Event 1823 Baron Jons Jackob Berzelius discovers silicon (Si), which today is the basic component of processors. 1903 Nikola Tesla patented electrical logic circuits called “gates” or “switches” in 1903. 1947 John Bardeen, Walter Brattain, and William Shockley invent the first transistor at the Bell Laboratories on December 23, 1947. 1948 John Bardeen, Walter … Read more
Year Event 1981 The first motherboard, originally called a “planar,” was used in the IBM Personal Computer. 1984 The AT, or Full AT, motherboard form factor was introduced by IBM in August 1984. 1985 IBM introduced the Baby AT motherboard form factor in 1985. 1987 The LPX motherboard form factor was developed by Western Digital … Read more
The first monitors use CRT technology (cathode ray rube) and firstly made in 1922. The earlier commercial version was produced in 1954. This technology used for 50 years until 2000 when the LCD technology replace it. The CRT technology used by computer monitors, and also for televisions too. Approximetly in 2000 the bigger monitor manufacturers start to … Read more
The while Loop – Linux Shell Programming While loops repeat statements as long as the next Unix command is successful. For Example : #!/bin/sh i=1 sum=0 while [ $i -le 100 ]; do sum=`expr $sum + $i` i=`expr $i + 1` done echo The sum is $sum.
Find LCM of two numbers in C What is LCM The Least Common Multiple ( LCM ) is also referred to as the Lowest Common Multiple ( LCM ) and Least Common Divisor (LCD) . For two integers a and b, denoted LCM(a,b), the LCM is the smallest positive integer that is evenly divisible by both a and b. For example, LCM(2,3) = … Read more
The history of the modern computer keyboard begins with a direct inheritance from the invention of the typewriter. It was Christopher Latham Sholes who, in 1868, patented the first practical modern typewriter. Soon after, in 1877, the Remington Company began mass marketing the first typewriters. After a series of technological developments, the typewriter gradually evolved into the standard … Read more
Today, the mouse is an essential input device for all modern computers but it wasn’t so long ago that computers had no mouse and no graphical user interface. Data was entered by typing commands on a keyboard. The mouse was invented by Douglas Engelbart in 1964 and consisted of a wooden shell, circuit board and … Read more
Follow the steps listed below to install Google Chrome on your CentOS system: Start by opening your terminal and downloading the latest Google Chrome .rpm package with the following wget command: wget https://dl.google.com/linux/direct/google-chrome-stable_current_x86_64.rpm Once the file is downloaded, install Google Chrome on your CentOS 7 system by typing: sudo yum localinstall google-chrome-stable_current_x86_64.rpm The command above … Read more
The HTTP 404, 404 Not Found, 404, Page Not Found, or Server Not Found error message is a Hypertext Transfer Protocol (HTTP) standard response code, in computer network communications, to indicate that the browser was able to communicate with a given server, but the server could not find what was requested. Further, when the … Read more
How to List All Files Ordered by Size in Linux This articles about listing files using the popular ls command, we covered how to list and sort files by last modification time (date and time) in Linux. To list all files in a directory, open a terminal window and run the following command. Note that when ls invoked … Read more