Caps lock is a key on many computer keyboards. Pressing it sets an input mode in which typed letters are uppercase by default (i.e. in All caps). The keyboard remains in caps lock mode until the key is pressed again. On some computers, holding down the shift key while caps lock is on temporarily switches to lowercase.

Keyboards often include a small LED to indicate that caps lock is active—either on the key itself, or in a row with scroll lock and num lock indicators. However, some new laptop and wireless desktop keyboards lack the LED, instead providing software that gives an on-screen indicator.

People typing case-sensitive passwords that are not displayed verbatim on the screen may not realize that caps lock is on, causing errors. Help guides, tech support materials, and sometimes the interface itself may include advice on checking caps lock before typing a password. In Windows login screens, a warning that caps lock is on is shown in a balloon near the field. In Mac OS X, when caps lock is on, a caps lock symbol (⇪) is displayed inside a password field. Operating systems may also provide audible notifications when caps-lock, num-lock, or scroll-lock buttons are toggled.

For Real was an American R&B and soul quartet, that formed in 1993. In the latter part of that decade they were nominated for a Grammy, Billboard Music Award, and Soul Train Music Award.

For Real secured their recording contract by accident. "We were picking up our manager from the airport. So we decided to greet him with an acappella song. Someone from A&M Records just happened to be in the airport and heard them perform. Not long after, they were signed," said Latanyia Baldwin.

The band released their debut album, It's a Natural Thang, with production from Brian McKnight on A&M Records in 1994, and it became a critical success, including a rare four stars from Rolling Stone magazine. Their first single, "You Don't Wanna Miss" hit #28 on the Billboard chart, courtesy of a danceable new jack swing remix by Steve "Silk" Hurley, which was featured in the song's video. A second single, "Easy to Love", peaked at #65 on the Billboard Hot 100 chart. The album scored another chart hit with the a cappella love song, "You Don't Know Nothin'", which was written and produced by Mervyn Warren, and which peaked at #27. The song peaked at #54 in the UK Singles Chart in July 1995. The album sold over one million copies worldwide, and peaked at #80 on the Billboard 200.