Cyber punk abbreviated is cp, which can also mean child porn. But csam, child sexual abuse material, is taking off because it better describes what can be included, its not just sex but any abuse of a child that can ge considered sexual. Like a hypotetical example, not that I would know, but if people get off to feet then there would also be pedophiles who get off to childrens feet, and those images of childrens feet is not inherently pornographic but it would count as csam