Name Explanation
Aircraft Mechanics Must be Specialised.
Automobile Bodywork The care, treatment and repair of automobile bodywork.  Not tanks etc.  specialise to Cars Bike or Buses.
Automotive Mechanics How to repair cars and motor bikes.  A general do it all skill as well at -5 Penalty.  Specialise for a +5 Bonus.  Not Bodywork.
Basic Electronics Basic handling and care of electronics.
Basic Mechanics Basic Care and Handling of Mechanical things.
Boat Building Must be Specialised, may further specialise for a +5 Bonus.
Carpentry Building things from wood and nails.
Clothier How to fashion clothes.
Computer Repair How to repair the hardware part of computers.
Demolition Destroying big structures efficiently.
Distilling The manufacture of spirits, by profession or amateur means, specify.
Electronic Engineering Knowing how to make an electronic device.
Electronic Equipment Knowing how to use an electronic device.
Electronic Lock picking Knowing how to open electronic locks.
Engineering Must be Specialised.
Leatherworking How to work leather for garment or weapon use, must be specialised. 
Locksmith How to make good locks and other things.  The quality of a lock would be used as a Penalty on the Pick Locks Development.
Mecha The operation or repair of Mecha, as in Giant robots or exoskeletons etc.  Must be Specialised.
Mechanic (specify) How to work on certain devices with moving parts.
Mechanical Engineer The Manufacture of components, possible the design as well at high Development level.
Metalworking May be Specialised to Jewellery; Industrial, which in particular may be Specialised further; Sculpture, instead of the artistic skill; and Building.
Pick Locks Open locks without the use of the key.  This skill is adjusted by how well made the lock is.  The more well made it is and the better of the materials used to make it will determine the penalty to this skill when attempting to open it.
Safecracking As it says.  May be Specialised.
Spacecraft Mechanics Specific Mechanic Skill for spacecraft which must be Specialised to at least level 2, because spacecraft are complex.  Owners of small spacecraft may take a Repair My Craft specialise at level 1 and stop there, but will be unable to repair any other craft.
Stone working Building walls houses etc typically, but may be specialise into other forms of masonry.
Telecommunications Use or repair, must be Specialised.  Anyone can use a phone without this development.
Weapons Engineer Must be Specialised, preferably to second level.