Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Abjad numerals are a decimal numeral system in which the 28 letters of the Arabic alphabet are assigned numerical values. They have been used in the Arabic- speaking world since before the 8th-century Arabic numerals. In modern Arabic, the word abjadiyyah means alphabet in general. In the Abjadi system, the first letter of the Arabic alphabet, alif, is used to represent 1 the second letter, bāʼ, is used to represent 2, etc. Individual letters also represent 10’s and 100’s ya for 10, kāf for 20, qāf for 100, etc. The word abjad itself derives from the first four letters in the proto-Canaanite alphabet, Phoenician alphabet, Aramaic alphabet etc. These older alphabets