Skip to Main Content
It looks like you're using Internet Explorer 11 or older. This website works best with modern browsers such as the latest versions of Chrome, Firefox, Safari, and Edge. If you continue with this browser, you may see unexpected results.
Purdue University Purdue Logo Purdue Libraries

Using the Library to Build Your Small Business: Home

for TCPL/ Ivy Tech Workshop

INSPIRE databases

Business Source Premier

Regional Business News

Small Business Resource Center


All available from here: Business and Career Databases

TCPL Libraries Resources

A to Z database

Morningstar Document Research

Legal Forums

All avalable from here: TCPL Databases

Entrepreneurship Business Plans

US Gov't Statistics

Classification Systems for Industries

The Standard Industrial Classification (SIC) is a U.S. system for classifying industries by a 4-digit code. In most cases it is being replaced by the more recent 6-digit North American Industry Classification System (NAICS).  Many databases will let you search by SIC and/or NAICS code, so it can be helpful to know the code(s) for the industries you are interested in.

NAICS Homepage

  • This official U.S. Government Web site provides the latest information on plans for NAICS revisions, as well as access to various NAICS reference files and tools.

SIC Manual

  • Online, searchable version of the Standard Industrial Classification Manua l , 1987

SIC Code & NAICS Code Conversion Tables

  • Online comparison between the 1987 Standard Industrial Classification Manual and the 1997 North American Industrial Classification System.

Subject Guide

Profile Photo
Prof. Heather Howard