The ISO Latin 1 character repertoire – a description with usage notes, section 3 The characters grouped by type, with annotations:

Other letters

The feminine ordinal indicator () and the masculine ordinal indicator () can be regarded as letters, too, since they correspond to letters "a" and "o" in specific situations.

The following characters are regarded as independent letters, although some of them are historically combinations of two letters or a letter and a diacritic:
(letter ae)
(o with stroke)
(sharp s)

Notice that the following characters are not regarded as letters, despite being historically formed from one or more letters:

Originally created 2000-03-31. Structurally changed 2018-10-16. Minor modifications 2018-12-15.
This page belongs to the free information site IT and communication by Jukka "Yucca" Korpela.