what you've done in your life
background
experience
knowledge
what you know
knowledge
experience
background
your past in general (where you come from, where you studied, etc)
background
experience
knowledge
(generally positive) characteristics
qualities
skills
talents
qualifications
strong natural abilities
skills
qualities
qualifications
talents
abilities developed by practice
skills
qualifications
talents
qualities
certificates which show you have learned something
talents
qualities
qualifications
skills