Alphabet Soup

What do these acronyms and numbers mean?

• STCI - Saskatoon Triathlon Club Incorporated
• STAC - Saskatchewan Triathlon Association Corporation
• STC - Saskatoon Triathlon Club
• 70.3 - A triathlon distance, in miles. Also known as an "Ironman 70.3" or "1/2 ironman-distance race". 70.3 is a trademark of the World Triathlon Corporation and is used to brand races.
• 140.6 - A triathlon distance, in miles. Also known as an 'Ironman(tm)' or 'ironman-distance' race.
• 5150 - A triathlon distance, in dekametres. 5150 is a trademark of the World Triathlon Corporation and is used to brand a standard-distance triathlon.
• 21.1, 13.1 - A distance of a running race commonly known as a 1/2 marathon. A 1/2 marathon is 13.1 miles (21.1 km).
• 42.2, 26.2 - A distance of a running race commonly known as a marathon. A marathon is 26.2 miles (42.2 km).
•  ITU - International Triathlon Union