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2. Time constant - Wikipedia

   en.wikipedia.org/wiki/Time_constant

   Time constant. In physics and engineering, the time constant, usually denoted by the Greek letter τ (tau), is the parameter characterizing the response to a step input of a first-order, linear time-invariant (LTI) system. [1][note 1] The time constant is the main characteristic unit of a first-order LTI system. It gives speed of the response.

3. Calculator input methods - Wikipedia

   en.wikipedia.org/wiki/Calculator_input_methods

   The TI-108 is a simple four-function calculator which uses single-step execution.. The immediate execution mode of operation (also known as single-step, algebraic entry system (AES) [7] or chain calculation mode) is commonly employed on most general-purpose calculators.

4. Timesheet - Wikipedia

   en.wikipedia.org/wiki/Timesheet

   Timesheet. A timesheet (or time sheet) is a method for recording the amount of a worker's time spent on each job. Traditionally a sheet of paper with the data arranged in tabular format, a timesheet is now often a digital document or spreadsheet. The time cards stamped by time clocks can serve as a timesheet or provide the data to fill one.

5. Reverse Polish notation - Wikipedia

   en.wikipedia.org/wiki/Reverse_Polish_notation

   Video: Keys pressed for calculating eight times six on a HP-32SII (employing RPN) from 1991. Reverse Polish notation (RPN), also known as reverse Łukasiewicz notation, Polish postfix notation or simply postfix notation, is a mathematical notation in which operators follow their operands, in contrast to prefix or Polish notation (PN), in which operators precede their operands.

6. Mechanical calculator - Wikipedia

   en.wikipedia.org/wiki/Mechanical_calculator

   This picture shows clockwise from top left: An Arithmometer, a Comptometer, a Dalton adding machine, a Sundstrand, and an Odhner Arithmometer. A mechanical calculator, or calculating machine, is a mechanical device used to perform the basic operations of arithmetic automatically, or (historically) a simulation such as an analog computer or a ...

7. Time-tracking software - Wikipedia

   en.wikipedia.org/wiki/Time-tracking_software

   Time-tracking software are computer programs that allows users to record time spent on tasks or projects. Time-tracking software may include time-recording software, which uses user activity monitoring to record the activities performed on a computer and the time spent on each project and task. Multiple industries utilize time-tracking software ...