Period in Norwegian

A full stop, or "period", (no. punktum) is a major separator. It is used as follows:

Ending a full sentence.
Abbreviated single words must normally end with a period.
- aug. (august), ca. (cirka), etc.
Abbreviations with multiple words
- cand.philol., f.eks.
Single ending period only when abbreviations use a single letter from each word
- mht. (med hensyn til), moh. (meter over havet), osv. (og så videre), pga. (på grunn av)
Exeption: no period for initials (abbr. of proper names), weight and measure, money, elements and books of the Bible.
- NRK (Norsk rikskringkasting), SAS (Scandinavian Airline System); mm (millimeter), m (meter), ts (teskje); kr (kroner), rbl (rubler), He (helium); Luk (Lukas), Rom (Romerbrevet)
Exeption: If a full sentence ends with an abbreviation with a period, there is no additional period to end the sentence.
Exeption: Headings are not ended with a period.
Ordinal numbers (like days and months of a date) are written as the cardinal number and a full stop.
- 1. (første), 2. (andre), 10. (tiende), Olav 5. (Olav den femte), 13.4., 7.7.2000
Optional separator for time
- kl. 14.00 or kl. 1400

Period should not be used as thousands separator (large numbers). Use space. 20 000 ; 9 000 000 000

Three periods (ellipsis) can be used to indicate hesitation, unfinished sentence, unfinished word or omissions in quotations.

Han er vel ikke ...? (Separated with a space when a complete word is omitted)
"En liten gyllen ring [...] symbolet på at vi skal sammen vandre." (often bracketed when marking an omission)