Palaeography (UK) or paleography (US; ultimately from , palaiós, "old", and , gráphein, "to write") is the study of historic writing systems and the deciphering and dating of historical manuscripts, including the analysis of historic handwriting. It is concerned with the forms and processes of writing; not the textual content of documents. Included in the discipline is the practice of deciphering, reading, and dating manuscripts, and the cultural context of writing, including the methods with which writing and books were produced, and the history of scriptoria. The discipline is one of the auxiliary sciences of history. It is important for understanding, authenticating, and dating historic texts. However, it generally cannot be used to pinpoint dates with high precision. Application Palaeography can be an essential skill for historians and philologists, as it tackles two main difficulties. First, since the style of a single alphabet in each given language has evolved constantly, it is necessary to know how to decipher its individual characters as they existed in various eras. Second, scribes often used many abbreviations, usually so as to write more quickly and sometimes to save space, so the specialist-palaeographer must know how to interpret them. Knowledge of individual letter-forms, ligatures, punctuation, and abbreviations enables the palaeographer to read and understand the text. The palaeographer must know, first, the language of the text (that is, one must become expert in the relevant earlier forms of these languages); and second, the historical usages of various styles of handwriting, common writing customs, and scribal or notarial abbreviations. Philological knowledge of the language, vocabulary, and grammar generally used at a given time or place can help palaeographers identify ancient or more recent forgeries versus authentic documents. Knowledge of writing materials is also essential to the study of handwriting and to the identification of the periods in which a document or manuscript may have been produced. An important goal may be to assign the text a date and a place of origin: this is why the palaeographer must take into account the style and formation of the manuscript and the handwriting used in it. Document dating Palaeography can be used to provide information about the date at which a document was written. However, "paleography is a last resort for dating" and, "for book hands, a period of 50 years is the least acceptable spread of time" with it being suggested that "the 'rule of thumb' should