HeP (Health Points)
Health Points indicate your physical condition. The lower your current score, the closer you are to death.
HeP = 10 + (Athl/2) + Cons

SaP (Sanity Points)
The more you have, the more mentally stable you are.
In a disturbing, post-apocalyptic world recently, you will not start off with a very impressive amount of sanity.
And sanity is easy to lose in wasteland2570.
SaP = 7 + Will - (Number of activated Magic Skills)

PoL (Points of Luck)
Points of Luck can be used in critical situations of the RPG. To re-roll a die or substitute missing skill points, for example (both with a chance od 100%). There is also a 50% chance to evade an attack or change your character's fate.
PoL can be purchased with XPs and are consumed after using.

Skills
Your skill ratings indicate how experienced or talented you are in different areas. They will dramatically increase your chance of succeeding in a skill check rolled with the d20 (20-sided die). Read more about Skills in The Skill Tree.
Skill Points can be purchased with XPs (1 to 1).

Artifacts
Artifacts are objects with special, potentially magical, features. Such as amulets. Or with some kind of unknown outcome, such as healing herbs, medication or toadstools.

Items & Equipment
This is your list of regular equipment, such as tools, food, survival items, and other useful objects.

Combat
Your combat ratings for melee and/or ranged fights. And your armour in case you wear more than just the usual clothing.