How to type Scands (å, ä, ö, aka The Three Little Pigs) on your default United States English keyboard.

1. Make sure the NUM LOCK is on.

2. Hold down the ALT-key, and then, by using the numeric keypad (on the right), type the character code. Then, release the ALT-key.

Alt Key codes:

ä, ö

1. Hold down the Option key, and type a u (the letter u).
2. Let go of the keys (don't hold them down for step 3).
3. Type the vowel over which you want the umlaut to appear.

Ä, Ö

Hold the Shift key down in step 3 Above.

ALT+0229 = å
ALT+0197 = Å

ALT+0228 = ä
ALT+0196 = Ä

ALT+0246 = ö 
ALT+0214 = Ö 

ALT+0156 = œ
ALT+0140 = Œ

ALT+0230 = æ
ALT+0198 = Æ

ALT+0248 = ø
ALT+0216 = Ø

Option+A                       = å
Shift+Option+A               = Å

Option + u, then a           = ä
Option + u, then shift + A = Ä

Option + u, then o           = ö 
Option + u, then shift + O = Ö 

Option+Q                        = œ
Shift+Option+Q                = Œ

Option+' (apostrophe key) = æ
Shift+Option+'                 = Æ

Option+O                        = ø
Shift+Option+O                = Ø