PlankalkÃ¼l (Plan Calculus) Konrad Zuse begins work on PlankalkÃ¼l (Plan Calculus), the first algorithmic programming language, with the goal of creating the theoretical preconditions for the solution of general problems. Seven years earlier, Zuse had developed and built the worldÂ´s first binary digital computer, the Z1.
Long period synonyms. Top synonym for long period (other word for long period) is eon.
When an abbreviation appears at the end of a sentence, a single period serves both to mark the abbreviation and to close the sentence. See Examples and Observations below. Also see: 1  10 Tips for Using Abbreviations in Formal Writing.2  Acronym. 3  Backronym. 4  Commonly Confused Latin Abbreviations in English.he abbreviated form of the word abbreviation is abbr .--or, less commonly, abbrv. or abbrev. In American English, many abbreviations are followed by a period (Dr., Ms.).