Differences In The "Mirror Mirror" Universe

TECHNOLOGY

1. The ISS Enterprise computer cannot locate crew members. Only Captain Picard and Security Officer Troi have this capability and only when in their quarters.
2. Ship's logs are extremely difficult to alter. Only Wesley Crusher has the ability to do so with a roll against Computer Operation -40.
3. Transporter logs are extremely difficult to alter.  Only Chief O'Brien has the ability to do so with a roll against Transporter Operation -30.
4. Ship's self destruct can only be initiated by Security Officer Troi.

SHIP'S OPERATIONS

1. The bridge always has four security guards on it: two at each turbolift entrance.
2. Each transporter room has two security guards in it.