Arabic is written from right to left, like other Semitic scripts, and consists of 17 characters, which, with the addition of dots placed above or below certain of them, provide the 28 letters of the Arabic alphabet. Short vowels are not included in the alphabet, being indicated by signs placed above or below the consonant or long vowel that they follow. Certain characters may be joined to their neighbors, others to the preceding one only, and others to the succeeding one only. The written letters...