Before revision: C4I2 – command, control, communications, computers, intelligence, and interoperability C5I – command, control, communications, computers, collaboration and intelligence C6ISR – command, control, communications, computers, cyber-defense and combat systems and intelligence, surveillance, and reconnaissance MDC2 - multi-domain command and control NC2 − nuclear command and control NC3 − nuclear command and control and communications and others.
After revision: C5I – command, control, communications, computers, cyber and intelligence (US Army)C4I2 – command, control, communications, computers, intelligence, and interoperability C5I – command, control, communications, computers, collaboration and intelligence C6ISR – command, control, communications, computers, cyber-defense and combat systems and intelligence, surveillance, and reconnaissance MDC2 - multi-domain command and control NC2 − nuclear command and control NC3 − nuclear command and control and communications and others.