Crossword Puzzle System of rules

Clue: System of rules

Office speaker system (INTERCOM with 8 letters)
Systematize, as rules (CODIFY with 6 letters)
Office computer system (LAN with 3 letters)
Common term that doesn't appear in the Official Rules of Golf (SANDTRAP with 8 letters)
Systems of rules (CODES with 5 letters)
High-tech office system (COMPUTERNETWORK with 15 letters)
Offer an opinion without being asked (OBTRUDE with 7 letters)
Computer system since the '60s (UNIX with 4 letters)
Official class member (ENROLLEE with 8 letters)
Prison guard system? (ESCAPECONTROL with 13 letters)