Thomas Register

Online platform for supplier discovery and product sourcing in the USA and Canada

The Thomas Register of American Manufacturers, now Thomas, is an online platform for supplier discovery and product sourcing in the US and Canada. It was once known as the "big green books" and "Thomas Registry", and was a multi volume directory of industrial product information covering distributors, manufacturers and service companies within thousands of industrial categories that is now published on Thomasnet.

The books were first published in 1898 by Harvey Mark Thomas as Hardware and Kindred Trades. In their heyday, Thomas Register of American Manufacturers was a 34 volume, 3 section buying guide offering sourcing information on industrial products and services, along with comprehensive specifications and detailed product information from thousands of manufacturers. The Thomas Regional Directory Company began as a division of Thomas Publishing in 1976. Thomas Regional Regional Industrial Buying Guides provided information in print and on CD ROM, on local OEMs, distributors, MRO services and other custom manufacturing services in 19 regional editions covering much of the United States. Thomas Register and Thomas Regional were available online from the mid 1990s. The company stopped publishing its print products in 2006. Thomas moved its database online as Thomasnet, published and maintained by Thomas Industrial Network, one of Thomas’ five business units. Thomasnet has expanded to provide not only product and company information, but also online catalogs, computer aided design (CAD) drawings, news, press releases and blogs. In December 2021, Thomas was acquired by Xometry.

Thomasnet is an information and technology company based in New York City. In the IMT, editors published editorials, interviews, and long form journalism on issues ranging from career skills, developments in the industry, and discussions with leading experts. Soon after, IMT Green & Clean was launched in response to the growing interest in green technology and its impact on the world. In 2011, the IMT Machining Journal was launched followed by the IMT Fluid & Gas Flow Journal, the IMT Career Journal, and the IMT Procurement Journal.

Starting in 2010, Thomasnet began reaching out to its database of manufacturers to get a better understanding of where the community was, where their shortcomings were, and where they saw the landscape going in the future. This yearly survey is called the Industry Market Barometer.