August 13 marks the 50th anniversary of the initial construction of the Berlin Wall, which cut off West Berlin from East Berlin and East Germany until its fall on November 9, 1989.First made of barbed wire and later of concrete, the guarded barrier was one of the most iconic and powerful symbols of the Cold War.ugust 13 marks the 50th anniversary of the initial construction of the Berlin Wall, which cut off West Berlin from East Berlin and East Germany until its fall on November 9, 1989. First made of barbed wire and later of concrete, the guarded barrier was one of the most iconic and powerful symbols of the Cold War.
The BIOS (/ËbaÉª.És/, an acronym for Basic Input/Output System and also known as the System BIOS, ROM BIOS or PC BIOS) is a type of firmware used to perform hardware initialization during the booting process (power-on startup) on IBM PC compatible computers, and to provide runtime services for operating systems and programs.
The BIOS firmware is built into personal computers (PCs), and it is the first software they run when powered on. The name itself originates from the Basic Input/Output System used in the CP/M operating system in 1975. Originally proprietary to the IBM PC, the BIOS has been reverse engineered by companies looking to create compatible systems and the interface of that original system serves as a de facto standard.