Electronic circuits can reliably distinguish two stable states, such as high and low voltage.
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A bit is one of the smallest units of binary information and can represent 0 or 1.
A file extension hints at a format, such as .txt, .png or .cpp.
Chinese characters are represented through character encodings too.
A byte usually contains 8 bits, a basic unit used throughout computer history.
A graphical interface lets people use icons, buttons and a mouse instead of typing every command.
Binary uses only 0 and 1; its place values are 1, 2, 4, 8 and 16.
A program is a set of instructions; software is often a complete product containing programs, data and documentation.
To convert a decimal number to binary, repeatedly divide by 2 and read the remainders backwards.