There are three types of packages in the game:
These are offered in the Core Rulebook and are designed to deal with a group that lacks skills among them that are necessary for a particular game. These are intended for Group Lifepath/Hybrid character creation, but can be offered at the beginning of any particular adventure.
Travellers can choose a Skill Package they wish, but a Referee should offer suggestions as to what kind of challenges are expected in the scenario at hand. Travellers are responsible for distributing skills among themselves, picking them one by one until they are all used.
Note: Skills in a Skill Package are always at Level 1!
List of Skill Packages
Reference: Core Rulebook, page 48.
These are involved in Package-based or Hybrid character creation. Player creating a character usually chooses the one they want out of the following list: Background Packages.
Reference: Traveller Companion, pages 14-15.
These are involved in Package-based character creation. Player creating a character usually chooses the one they want out of the following list: Career Packages.
Reference: Traveller Companion, pages 16-21.