There is no such difference. All digital computers have elements that basically work with two different states; these are commonly called 1s and 0s, sometimes "true"and "false". But there is no difference in this sense between IBM and Apple.
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Most computers use ASCII (or some similar) encoding, in which 'A' is represented as 65, or 01000001 binary. Older IBM mainframes use an entirely different encoding.
Short for Extended Binary Coded Decimal Interchange Code, EBCDIC was first developed by IBM and is a coding method generally used by larger computers to present letters, numbers or other symbols in a binary language the computer can understand. EBCDIC is similar to ASCII commonly used on most computers and computer equipment today.
IBM
John Backus and IBM :))
James Gimzewski at the IBM laboratory in Zurich, Switzerland made the world's smallest calculator.