Scoring
When were games renamed "sets" and reduced to 25 points to win?
Volleyball
Volleyball 2001 NCAA Division I Women's Volleyball Tournament 1996 Russian Second League Russian Third League 1996 Tennis at the 2012 Summer Olympics – Mixed doubles
Volleyball-Scoring 2001_NCAA_Division_I_Women's_Volleyball_Tournament-Abstract 1996_Russian_Second_League-Standings Russian_Third_League_1996-Standings_5 Tennis_at_the_2012_Summer_Olympics_–_Mixed_doubles-Abstract
When the ball contacts the floor within the court boundaries or an error is made, the team that did not make the error is awarded a point, whether they served the ball or not. If the ball hits the line, the ball is counted as in. The team that won the point serves for the next point. If the team that won the point served in the previous point, the same player serves again. If the team that won the point did not serve the previous point, the players of the team rotate their position on the court in a clockwise manner. The game continues, with the first team to score 25 points by a two-point margin is awarded the set. Matches are best-of-five sets and the fifth set, if necessary, is usually played to 15 points. (Scoring differs between leagues, tournaments, and levels; high schools sometimes play best-of-three to 25; in the NCAA matches are played best-of-five to 25 as of the 2008 season. )Before 1999, points could be scored only when a team had the serve ("side-out scoring") and all sets went up to only 15 points. The FIVB changed the rules in 1999 (with the changes being compulsory in 2000) to use the current scoring system (formerly known as "rally point system"), primarily to make the length of the match more predictable and to make the game more spectator- and television-friendly. The final year of side-out scoring at the NCAA Division I Women's Volleyball Championship was 2000. Rally point scoring debuted in 2001 and games were played to 30 points through 2007. For the 2008 season, games were renamed "sets" and reduced to 25 points to win.
The 2001 NCAA Division I Women's Volleyball Tournament began on November 29, 2001 with 64 teams and ended December 15 when Stanford defeated Long Beach State 3 games to 0 in San Diego, California for the program's fifth NCAA title. Led by future Olympians Logan Tom and Ogonna Nnamani, Stanford stunned previously unbeaten Long Beach State in the title match. Long Beach State was attempting to become the first program to go undefeated in more than one season, as they went 36-0 just 3 years before in 1998. On their way to the title, Stanford was able to knock off defending champion Nebraska in the national semifinals. The other semifinal participant, Arizona, made the program's first NCAA Final Four appearance. The win gave Stanford head coach John Dunning, who was in his first year as Stanford's head coach, his third NCAA title as he won two with Pacific in the 1980s. This was the first year of rally point scoring in the NCAA Division I tournament, with games going to 30 points to win. Previous years used the side out scoring (SOS), with 15 points needed to win. Games became "sets" in 2008 and were reduced to 25 points to win.  
Zone West. Notes:  6 points were deducted from FC Olimp Kislovodsk. FC Iriston Vladikavkaz were excluded from the league after playing 19 games and gaining 25 points. All their results were discarded. FC Kolos Krasnodar were excluded from the league after playing 18 games and gaining 20 points. All their results were discarded. Kolos did not participate in any national-level competitions in 1997. FC Anzhi Makhachkala awarded 1 home win. FC Moskovskiy-Selyatino renamed to FC MChS-Selyatino. FC Avtodor-BMK Vladikavkaz renamed to FC Avtodor. FC Angusht Malgobek moved to Nazran. FC Turbostroitel Kaluga did not participate in any national-level competitions in 1997.  
Zone 6. FC Gornyak-Vanadiy Kachkanar renamed to FC Gornyak. Gornyak was excluded from the league after playing 12 games and gaining 22 points. Opponents were awarded a win in the remaining games. FC Dynamo Perm awarded 1 home win. FC Planeta Bugulma renamed to FC Neftyanik. FC Dynamo-Gazovik-d Tyumen, FC Gornyak Kushva and FC Uralmash-d Yekaterinburg did not play in any national-level competitions in 1997.  
The mixed doubles tennis tournament at the 2012 Olympic Games in London was held from 1 to 5 August on the grass courts of the All England Lawn Tennis and Croquet Club in Wimbledon. Tie-breaks were used for the first two sets of each match, which was the best of three sets. If the score was tied at one set all, a 'super tie-break' (the first pairing to win at least 10 points by a margin of two points) would be used. This was the first time mixed doubles was included in the Olympic tennis programme since Paris in 1924, when Hazel Wightman and Richard Williams won gold. 