Technical (adjective)

1. Relating to or involving technology.
2. Having or showing specialized knowledge or skill in a particular field.
3. Relating to the practical application of a particular subject or field.

Origin:

Late middle english, from latin technicalis of art, from greek technikos of art, from technē art, craft.

Examples:

1. The car has a technical problem.
2. The manual is written in technical language.
3. This is a technical manual.
4. He is a technical expert.
5. He is a technical writer.