encguide – Doc­u­men­ta­tion of LaTeX font en­cod­ings

The doc­u­ment dis­cusses the con­cepts be­hind, and the re­stric­tions that af­fect LaTeX's use of font en­cod­ings. The doc­u­ment also lists sev­eral ex­tant ‘recog­nised’ en­cod­ings, giv­ing glyph ta­bles for them.
Part of a set of doc­u­men­ta­tion that also cov­ers new LaTeX 2e com­mands, class and pack­age writ­ing, type­set­ting Cyril­lic, font us­age in LaTeX 2e, con­fig­u­ra­tion op­tions and mod­i­fi­ca­tion of la­tex.