What is the meaning of Littera?

identification letter, ordinal letter

a letter used to distinguish different banknotes, coins, etc. of the same denomination

identification code of a class of rolling stock

denomination (of a stock certificate)

phase of a project, etc. (in billing, invoicing, etc.; any unit which may be billed for, often as part of a larger project)

a free (train) ticket or ticket rebate offered to military transportation or to conscripts

letter (of the alphabet)

letter (an epistle)

letter (of the alphabet)

handwriting

letter, epistle

literature

letters, knowledge of literature, learning, scholarship

books (often a collection of letters, epistles, accounts, records, etc.)

record(s), account(s), document(s)

edict, ordinance

A sequence of letters (and sometimes digits), or a single such character, used as a designation; a class, code, model, number, or type.

Source: wiktionary.org