CISC gagara ce wacce ke tsaye ga "Complex Umarni Saita Kwamfuta." Wani nau'i ne na gine-ginen kwamfuta inda kowace koyarwa za ta iya yin ayyuka masu ƙananan ƙananan matakai a cikin zagaye guda. Sabanin gine-ginen RISC (Rage Instruction Set Computer), masu sarrafa CISC yawanci suna da tsarin koyarwa mafi girma kuma mai rikitarwa, wanda ke ba su damar yin hadaddun ayyuka a cikin ƴan umarni. Koyaya, gine-ginen CISC na iya zama mafi wahala don haɓakawa don saurin gudu kuma yana iya wahala daga raguwar aiki a wasu lokuta.