The Units package is based on the IEEE/ASTM SI 10-1997 Standard [6] and NIST Special Publication 811, 1995 Edition Guide [4] for use of the International System of Units (SI). The package is compliant with the IEEE standard up to the following differences.

[1] Abramowitz, Milton, and Stegun, Irene, A. Handbook of Mathematical Functions, pp. 6-8. Dover Publications, 1972.

[2] Cardarelli, Francois. Scientific Unit Conversion. 2nd ed. Springer-Verlag, 1999.

[3] Lide, David R. Handbook of Chemistry and Physics, pp. 1.1-1.6, 1.20-1.43.

CRC, 1995-1996.

[4] Taylor, Barry. Guide for the Use of the International system of Units (SI). 1995 ed. NIST Special Publication 811, 1995.

[5] The International System of Units (SI). 7th ed. Bureau International des Poids et Measures, 1998.

[6] Standard for Use of the International System of Units (SI): The Modern Metric System, IEEE/ASTM SI 10-1997.