Pattern-Making Calculator
Basic Patterns For Apparel Design
http://pattern.stringcodes.com/

EngNet Engineering Units Converter
EngNet is an Engineering Directory, Buyers Guide & Search Engine - Designed by Engineers to benefit the Engineering Industry. EngNet enables you to source Engineering Products, Services and Companies
http://www.engnetglobal.com/tips/convert.asp

Line Density Conversion Calculator
On-line conversion calculator for units of line density, including a special calculator for the conversion of textile yarns. From Cleave Books.
http://www.cleavebooks.co.uk/scol/ccdenlin.htm

Aom-Sun Limited
Manufacturer and exporter of calculator such as pocket size calculator, desk top calculator, scientific calculator and portable audio and video products.
http://www.aomsun.com

Lee Handerson
Manufacturer and exporter of desktop calculator, game calculator, pocket calculator, currency converter, databank calculator, as also produces clock and gift set.
http://www.leehanderson.com/

Metric Conversions
Metric conversions and US customary units - use the online metric converter and tables for unit measurements including temperature, weight, volume, area, length, plus currency converter, fractions & more by Science Made Simple.
http://www.sciencemadesimple.com/conversions.html

Calculators, Inc.
Calculators, Inc. (1-800-533-9921) offers the most complete line of educational calculators plus...
http://www.calculatorsinc.com/

International System of Units
Definitions of SI units and SI prefixes, units outside the SI, rules and style conventions, historical context for SI units, international aspects of the SI, and unit conversions.
http://physics.nist.gov/cuu/Units/index.html

Microguru Corporation
Basic Inventory Control (BIC) tracks the orders, receipts, shrinkage, allocation, and shipment of products. BIC displays physical units in stock, allocated units, available units in stock, and units on order.
http://www.microguru.com/

Conversion of Units
Database of conversion factors and a calculator.
http://www.chemie.fu-berlin.de/chemistry/general/units_en.html