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.
Follow the steps given below. 1  Find the last period start date. 2  Find out shortest and longest period cycles by observing your period cycles for atleast 6 months. 3  Illustrative example of calculating fertile period.  shortest cycle=27 1  days. longest cycle=28 days.  Subtract 18 days from the shortest cycle 27-18=9 days. Subtract 10 days from the longest cycle 28-10=18 days. The 9th day to 18 th day from your last period is the unsafe period. The rest is the safe period.