Seven-segment display letter to be unambiguous, merely for the words as a whole to be readable. Similar displays with fourteen or sixteen segments are available allowing less-ambiguous representations of the alphabet. Using a restricted range of letters that look like (upside-down) digits, seven-segment displays are commonly used by school children to form words and phrases using a technique known as "calculator spelling". Seven-segment display A seven-segment display (SSD), or seven-segment indicator, is a form of electronic display device for displaying decimal numerals that is an alternative to the more complex dot matrix displays. Seven-segment displays are widely used in digital clocks, electronic
Sixteen characteristics Sixteen characteristics The sixteen characteristics are an extended elaboration of the Four Noble Truths. For each truth, they describe four characteristics. The Tibetan tradition emphasizes the study of the sixteen characteristics of the Four Noble Truths, as described in the "Abhisamayalamkara". The Mahayana text "Ornament of Clear Realization (Abhisamayalamkara)" identifies four characteristics of each truth, for a total of sixteen characteristics, which are presented as a guide to contemplating and practicing the four noble truths. The "Ornament of Clear Realization" is a key text in the curriculum of Tibetan Buddhist monasteries and study colleges, and this method of study and