1. The issuing of messages to a terminal user, requesting information necessary to continue processing. µo°e«H®§µ¹²×ºÝ¥Î¤á,n¨D¬°Ä~Äò³B²z´£¨Ñ©Ò¥²»Ýªº«H®§¡C 2. A method of requesting specific types of data input from a terminal user by visual messages and, sometimes, audible signals. ¥Î«Ì¹õÅã¥Ü¹q¤å,¦³®ÉÁ٥εÅT«H¸¹½Ð¨D²×ºÝ¥Î¤á¿é¤J³W©wÃþ«¬¼Æ¾Úªº¤@ºØ¤èªk¡C 3. In systems with time sharing, a function that helps a terminal user by requesting him to supply operands necessary to continue processing. ¦b¤À®É¨t²Î¤¤,¥Î´£¥Ü½Ð¨Dªº¿ìªkÀ°§U²×ºÝ¥Î¤á´£¨Ñ¬°Ä~Äò§@¤U¥h©Ò¥²¶·ªº¾Þ§@¼Æªº¤@ºØ¥\¯à¡C
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