This is the skill required to be considered a Decker. This is advanced knolwedge of the Matrix and programing. Deckers are the ones who know how to hack into computer systems and engage in cybercombat with other deckers or Intrusion Countermeasures (IC). Deckers use specially built cyberdecks to (often illegally) log into the Matrix and do things like run search routines, tap phone calls, break into systems and retrieve data. They rely on a variety of programs to accomplish such tasks.