Rasm is an Arabic writing script often used in the early centuries of Classical Arabic literature. It is the same as today's Arabic script except for the difference that the Arabic diacritics are omitted. These diacritics include consonant pointing or ʾiʿjām (إِعْجَام), and supplementary diacritics or taškīl (تَشْكِيل). The latter include the ḥarakāt (حَرَكَات) short vowel marks—singular: ḥarakah (حَرَكَة). As an example, in rasm, the two distinct letters ص ض are indistinguishable because ʾiʿjām is omitted, or letters similar in shape ک ك may also become indistinguishable if the diacritics are omitted. Rasm is also known as Arabic skeleton script. This concept is somewhat similar to scriptio continua in the Latin script, where all spaces and other punctuations is omitted. The rasm form was common for writing Arabic until the early 2nd millennium.