Main Enginering

Scotty once said
" i know the limits of this
- i know what the instructions are - I wrote them "

It was the episode
"The Dysonsphere TNG"
he said those vise words to Georgi.

Remembers his words when you study the technology
- Scotty was there in the egining.

Astronavigation
Cloaking technology
Communication
HoloTech
Impulse engine
General medical technology
Phasers
Photon torpedo
Sheilds
Tractor beam