IBM includes support for this code page in the hardware of its model 5150, known as 'IBM-PC', considered the first personal computer. In this way was added the ASCII characters ranging from 128 to 255. Also 128 characters were added, with new symbols, signs, graphics and latin letters, all punctuation signs and characters needed to write texts in other languages, such as Spanish. In 1981, IBM developed an extension of 8-bit ASCII code, called 'code page 437', in this version were replaced some obsolete control characters for graphic characters. So with this set of only 128 characters was published in 1967 as standard, containing all you need to write in English language.

This code arises from reorder and expand the set of symbols and characters already used in telegraphy at that time by the Bell company.Īt first only included capital letters and numbers, but in 1967 was added the lowercase letters and some control characters, forming what is known as US-ASCII, ie the characters 0 through 127. The American Standard Code for Information Interchange, or ASCII code, was created in 1963 by the 'American Standards Association' Committee or 'ASA', the agency changed its name in 1969 by 'American National Standards Institute' or 'ANSI' as it is known since.

How to make tilde