One of the great technical challenges of introducing color broadcast television was the desire to conserve bandwidth, potentially three times that of the existing black-and-white standards, and not use an excessive amount of radio spectrum. In the United States, after considerable research, the National Television Systems Committee[1] approved an all-electronic system developed by RCA which encoded the color information separately from the brightness information and greatly reduced the resolution of the color information in order to conserve bandwidth. The brightness image remained compatible with existing black-and-white television sets at slightly reduced resolution, while color televisions could decode the extra information in the signal and produce a limited-resolution color display. The higher resolution black-and-white and lower resolution color images combine in the eye to produce a seemingly high-resolution color image. The NTSC standard represented a major technical achievement.

Known as the Commonwealth realms, and their territories and dependencies, and head of the 53-member Commonwealth of Nations.
Full name: Elizabeth Alexandra Mary Windsor
Spouse: Prince Philip, Duke of Edinburgh (m. 1947)
Children: Charles, Prince of Wales, Anne, Princess Royal, Prince Edward, Earl of Wessex, Prince Andrew, Duke of York
Siblings: Princess Margaret, Countess of Snowdon
Parents: Queen Elizabeth The Queen Mother, George VI
her birthday is on April 21, 1962

Born: July 18, 1921 (age 92), Cambridge, OH
Space missions: STS-95, Mercury-Atlas 6
Spouse: Annie Glenn (m. 1943)
Education: Muskingum University
First space flight: Mercury-Atlas 6
Children: John David Glenn, Carolyn Ann Glenn

Education: Pontifical Ecclesiastical Academy, University of Rome La Sapienza, Pontifical Gregorian University
Books: Populorum progressio, Ecclesiam Suam
Born: September 26, 1897, Concesio, Italy
Died: August 6, 1978, Castel Gandolfo, Italy

he was one of the greatest players in baseball history. Mantle was inducted into the National Baseball Hall of Fame in 1974 [2] and was elected to the Major League Baseball All-Century Team in 1999. He won the Triple Crown in 1956, leading MLB in batting average, home runs, and runs batted in (RBI).
Mantle was noted for his ability to hit for both average and power, especially tape-measure home runs. He won the Triple Crown in 1956, leading MLB in batting average, home runs, and runs batted in (RBI). He was an American League (AL) Most Valuable Player (MVP) three times and All-Star sixteen times, playing in 19 of the 20 All-Star games he was named to. Mantle appeared in 12 World Series, his team winning 7 of them. He holds the records for most World Series home runs (18), RBIs (40), runs (42), walks (43), extra-base hits (26), and total bases (123). He is also the career leader (tied with Jim Thome) in walk-off home runs, with a combined thirteen, twelve in the regular season and one in the postseason.