ulum-al-quran

Ta Sin: 27.
Ta Sin Mim: 26, 28.
Ta Ha:20.
Qaf: 50.
Kaf Ha Ya 'Ain Sad: 19.
Nun: 68.
Ya Sin: 36.
Variety of Explanations
The meaning and purpose of these letters is uncertain. There have been a variety of explanations offered by Muslim
scholars throughout the ages. Among them are: [See itqan, 11, pp.9-11.]
These letters might be abbreviations for certain sentences and words, such as e.g. Alif Lam Mim meaning
Ana llahu A'lam; or Nun meaning Nur (light), etc.
These letters are not abbreviations but symbols and names of Allah, or something else. [e .g. the letter
nun standing for 'fish' . which occurs in every sura that has nun as 'abbreviated letter' in front, or ta
standing for snake, as every sura with [a as abbreviated letter w in front contains the story of Musa and
the snake.]
These letters have some numerical significance, as the semitic letters also have numerical value.
These letters were used to attract the attention of the Prophet (and later his audience) for the revelation
to follow.
There are also many other explanations which cannot be referred to here. The 'abbreviated letters' are part of the
Qur'anic message, revealed to the Prophet Muhammad and therefore included in the text of the Qur'an. They are to be
recited and read as part of the suras where they occur. They are a good example for one kind of mutashabihdt which is
referred to in the Qur'an itself, (3: 7), the meaning of which is known to Allah. The Qur'an says of them: '... these are the
symbols of the perspicuous book' (12: 1).