In 1928, Ralph Hartley observed a fundamental storage principle, which was further formalized by Claude Shannon in 1945: the information that can be stored in a system is proportional to … 展开

• 1 bit: Answer to a yes/no question
• 1 byte: A number from 0 to 255
• 90 bytes: Enough to store a typical line of text from a book
• 512 bytes = … 展开

• Representation of numerical values and SI units in character strings for information interchanges
• Bit Calculator – Make conversions between bits, bytes, kilobits, kilobytes, megabits, megabytes, gigabits, gigabytes, terabits, terabytes, … 展开

Several conventional names are used for collections or groups of bits.
Byte
Historically, a byte was the number of bits used to encode a 展开

Several other units of information storage have been named:
• 1 bit: unibit
• 2 bits: dibit, … 展开

• Metric prefix
• File size
• ISO 80000-13 (Quantities and units — Part 13: Information science and technology) 展开