These are the 7 main stats: Strength (stat_Str), Dexterity (stat_Dex), Constitution (stat_Con), Intelligence (stat_Int), Wisdom (stat_Wis), Charisma (stat_Cha).
A skill scroll $ARCH/readable/scrollr.base.111.png is a special scroll that, when successfully read, teaches you the basics of a given Skill (skill_help in pod). Wether you successfully read and learn the skill depends on your intelligence (stat_Int).
Your character has different "weapon/item" slots, one of which is the ranged slot. It can contain a spell, a skill (skill_help in pod) or a ranged weapon. It will be used whenever you invoke your ranged attack (usually Shift+direction).
These are the 7 main stats: Strength (stat_Str), Dexterity (stat_Dex), Constitution (stat_Con), Intelligence (stat_Int), Wisdom (stat_Wis), Charisma (stat_Cha).
There are 6 secondary statistics: Weapon Class (stat_Wc) (Wc), Armor Class (stat_Ac) (Ac), Damage (stat_Dam) (Dam), Armor (stat_Arm) (Arm), Speed (stat_Spd) (Spd), and Weapon Speed (stat_WSp) (WSp).
A mapspace is a square part of the world, that is just large enough to hold your character or a small monster.