Search results
Results From The WOW.Com Content Network
Derek J. de Solla Price (1922–1983) with a model of the Antikythera mechanism. Captain Dimitrios Kontos (Δημήτριος Κοντός) and a crew of sponge divers from Symi island discovered the Antikythera wreck in early 1900, and recovered artefacts during the first expedition with the Hellenic Royal Navy, in 1900–01. [32]
An abacus (pl.: abaci or abacuses), also called a counting frame, is a hand-operated calculating tool which was used from ancient times in the ancient Near East, Europe, China, and Russia, until the adoption of the Hindu–Arabic numeral system. [1] An abacus consists of a two-dimensional array of slidable beads (or similar objects). In their ...
The Roman abacus was the first portable calculating device for engineers, merchants, and presumably tax collectors.It greatly reduced the time needed to perform the basic operations of arithmetic using Roman numerals.
Ancient Greek units of measurement varied according to location and epoch. Systems of ancient weights and measures evolved as needs changed; Solon and other lawgivers also reformed them en bloc . [ citation needed ] Some units of measurement were found to be convenient for trade within the Mediterranean region and these units became ...
Discover the best free online games at AOL.com - Play board, card, casino, puzzle and many more online games while chatting with others in real-time.
Friden made a calculator that also provided square roots, basically by doing division, but with added mechanism that automatically incremented the number in the keyboard in a systematic fashion. The last of the mechanical calculators were likely to have short-cut multiplication, and some ten-key, serial-entry types had decimal-point keys.
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
Calculator (programmable): the Programma 101, one of the first desktop electronic programmable calculators, was designed by a small team led by Pier Giorgio Perotto of Olivetti, between 1962 and 1964 and launched in 1965. [49] [50] Dipped candle: Romans made candles using rendered animal fat (called tallow), beginning around 500 BC. [51]