Norwegian letters:

to type Norwegian letters using standard keybord:

Lowercase letters:  (Num Lock ON)

 æ = alt + 0230 ( or 145)
 ø = alt + 0248
 å = alt + 0229 (or 134)

 

Capital letters:  (Num Lock ON)

 Æ = alt + 0198 (or 146)
 Ø = alt + 0216
 Å = alt + 0197 (or 143)