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Words per minute, commonly abbreviated WPM, is a measure of words processed in a minute, often used as a measurement of typing speed or reading speed. For the purpose of typing measurement, each word is standardized to be five characters or keystrokes long in English,〔Ahmed Sabbir Arif, Wolfgang Stuerzlinger (Analysis of Text Entry Performance Metrics ) Dept. of Computer Science & Engineering York University〕 including spaces and punctuation. For example, the phrase "I run" counts as one word, but "rhinoceros" and "let's talk" both count as two. Characters per minute (CPMn), a measure of characters processed in a minute, is normally WPM times five for English, so that 20 WPM is 100 CPM. == Alphanumeric entry == Brandon Raziano found that one study of average computer users in 1998, the average rate for transcription was 33 words per minute, and 19 words per minute for composition. In the same study, when the group was divided into "fast," "moderate," and "slow" groups, the average speeds were 40 wpm, 35 wpm, and 23 wpm, respectively. An average professional typist types usually in speeds of 50 to 80 wpm, while some positions can require 80 to 95 (usually the minimum required for dispatch positions and other time-sensitive typing jobs), and some advanced typists work at speeds above 120 wpm. Two-finger typists, sometimes also referred to as "hunt and peck" typists, commonly reach sustained speeds of about 37 wpm for memorized text and 27 wpm when copying text, but in bursts may be able to reach much higher speeds.〔 From the 1920s through the 1970s, typing speed (along with shorthand speed) was an important secretarial qualification and typing contests were popular and often publicized by typewriter companies as promotional tools. The fastest typing speed on an alphanumeric keyboard, 216 words in one minute, was achieved by Stella Pajunas in 1946 on an IBM electric. , writer Barbara Blackburn was the fastest alphanumerical English language typist in the world, according to The Guinness Book of World Records. Using the Dvorak Simplified Keyboard, she maintained 150 wpm for 50 minutes, and 170 wpm for shorter periods. Her top speed was 212 wpm. Current online records of sprint speeds on short text selections are 290 wpm, achieved by Guilherme Sandrini, on typingzone.com, and 256 wpm (a record caught on video), achieved by Sean Wrona, on TypeRacer. Wrona also maintained 174 wpm on a 50-minute test taken on hi-games.net.〔https://www.youtube.com/watch?v=tssh_aKxc5g〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「words per minute」の詳細全文を読む スポンサード リンク
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