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12 hours ago · Feed system. 30-round detachable STANAG magazine [a] Sights. Iron sights or various optics. The M4 carbine (officially Carbine, Caliber 5.56 mm, M4) is a 5.56×45mm NATO, select-fire, gas-operated, [b] magazine -fed carbine -length assault rifle developed in the United States during the 1980s. It is a shortened version of the M16A2 assault rifle.
12 hours ago · Paper tape was a very popular medium for long-term program storage until the 1980s, less costly and in some ways less fragile than magnetic tape. In particular, the Teletype Model 33 machine assignments for codes 17 (control-Q, DC1, also known as XON), 19 (control-S, DC3, also known as XOFF), and 127 ( delete ) became de facto standards.
