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These are mnemonic lists to assist in the bulk memorization of huge dialogs without the help of writing.
Manjushri's mantra (Om A Ra Pa Ca Na Dhih), is suspected of being a mneumonic for a list of items, but the original details are lost to history.
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All these are collectively referred as the Dhamma.
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They might be called mātikā (Pali) or mātṛkā (Sanskrit), as defined e.g. here or here.
Or this article on Buddhist Lists says,
Towards the close of the Nikaya period, Buddhist literature begins to employ the term matika to signify composite matrices for lists. The careful analysis of these complex lists and their sub-categories becomes the basis and literary characteristic of the third basket of the Pali Canon, the Abhidhamma-pitaka, and of the particular system of thought set out in those texts and their commentaries, i.e., the Abhidhamma.
Andrei has used the word occasionally in his answers.