EMH Mark 1

The EMH (Emergency Medical Hologram) Mark 1 was an short term replacement of the chief medical officer. It was designed for maximum use of two months however on the USS Voyager it is active for the better part of seven years since the medical staff are killed while the crew of Voyager are 'thrown' into the Delta Quadrant. See Kathryn Janeway for information.

Quotes
I'm a doctor, Mr Neelix, not a decorator.

I'm a doctor, not a bartender.

I'm a doctor, not a performer.

I'm a doctor, not a counter insurgent.

I'm a doctor, not a database.

I'm a doctor, not a battery.

I'm a doctor, not a dragon slayer.

I'm a doctor, not a zoo-keeper.

I'm a doctor, not an engineer.

- The Doctor

The Mobile Emitter
The mobile emitter is a 29th century self sustaining device capable of projecting a hologram without the need of holo-projectors.