between the sexagesimal degree subdivisions but no spaces between the numbers and units, for example . In the case of degrees of temperature, three scientific and engineering standards bodies (the International Bureau of Weights and Measures, the International Organization for Standardization and the U.S. Government Printing Office) prescribe printing temperatures with a space between the number and the degree symbol, e.g. . However, in many works with professional typesetting, including scientific works published by the University of Chicago Press or Oxford University Press, the degree symbol is printed with no spaces between the number, the symbol, and the Latin letters "C" or "F" representing Celsius or Fahrenheit, respectively, e.g. . This is also the practice of the University Corporation for Atmospheric Research, which operates the National Center for Atmospheric Research. Both ASTM International and NIST, the official US entities related to the standardization of the use of units, require a space between the numerical value and the unit designator, except when the degree symbol alone is used to denote an angular value. Use of the degree symbol to refer to temperatures measured in kelvins (symbol: K) was abolished in 1967 by the 13th General Conference on Weights and Measures (CGPM). Therefore, the triple point of water, for instance, is written simply as 273.16 K. The name of the SI unit of temperature is now "kelvin", in lower case, and no longer "degrees Kelvin". In photography, the symbol is used to denote logarithmic film speed grades. In this usage, it follows the number without spacing as in 21° DIN, 5° ASA or ISO 100/21°. Encoding The degree symbol is included in Unicode as . For use with Chinese characters there are also code points for and . The degree sign was missing from the basic 7-bit ASCII set of 1963, but in 1987 the ISO/IEC 8859 standard introduced it at position 0xB0 (176 decimal) in all variants except Part 5 (Cyrillic), 6 (Arabic), 7 (Greek) and 11 (Thai). In 1991 the Unicode standard incorporated all of the ISO/IEC 8859 code points, including the degree sign (at U+00B0).. The Windows Code Page 1252 was also an extension of ISO/IEC 8859-1 (Part 1 or Latin-1) standard, so it had the degree sign at the same code point, 0xB0. The code point in the older DOS Code Page 437 was 0xF8 (248 decimal); therefore, the Alt code used to enter the symbol directly from