On off symbols11/7/2022 It has also been used in corporate logos, such as for Gateway, Inc. It is often found emblazoned on fashion items including t-shirts and cuff-links. The standby symbol, frequently seen on personal computers, is a popular icon among technology enthusiasts. Universal power symbols are described in the International Electrotechnical Commission (IEC) 60417 standard, Graphical symbols for use on equipment, appearing in the 1973 edition of the document (as IEC 417) and informally used earlier. This alternative symbolism was published as IEEE standard 1621 on December 8, 2004. Under this proposal, the older standby symbol would be redefined as a generic "power" indication, in cases where the difference between it and the other power symbols would not present a safety concern. Proponents include the California Energy Commission and the Institute of Electrical and Electronics Engineers. Standby symbol ambiguity īecause the exact meaning of the standby symbol on a given device may be unclear until the control is tried, it has been proposed that a separate sleep symbol, a crescent moon, instead be used to indicate a low power state. The symbol for the standby button was created by superimposing the symbols "|" and "◯" however, it is commonly interpreted as the numerals "0" and "1" (binary code) yet, the International Electrotechnical Commission (IEC) holds these symbols as a graphical representation of a line and a circle. This standard is still used on toggle power switches. As technology became more ubiquitous, these English words were replaced with the universal symbols line "|" for "on" and circle "◯" for "off" (typically without serifs) to bypass language barriers. Originally, most early power controls consisted of switches that were toggled between two states demarcated by the words On and Off. The well-known on/off power symbol was the result of the logical evolution in user interface design.
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