San (letter) San (letter) San (Ϻ) was an archaic letter of the Greek alphabet. Its shape was similar to modern M, or ϡ, or to a modern Greek Sigma (Σ) turned sideways, and it was used as an alternative to Sigma to denote the sound . Unlike Sigma, whose position in the alphabet is between Rho and Tau, San appeared between Pi and Qoppa in alphabetic order. In addition to denoting this separate archaic character, the name "San" was also used as an alternative name to denote the standard letter Sigma. The existence of the two competing letters Sigma and San is
Metrication in the United States SI is widespread for many applications. Residential electric power plans use kilowatt hours. The luminous flux from lamps is specified in lumens rather than candlepower. The letter "K" is commonly used to denote "thousand" (e.g., "She earns $80K"), even though this is inconsistent with the lowercase "k" in SI. This usage has largely replaced the letter "G" (for "grand", used almost exclusively for money) and the Roman numeral "M" that was commonly used for "thousand" before the 1960s; in fact, the "M" has now come to denote "million" (e.g., "$32.5M budget"). Televised and radio weather reports are given in degrees