How to Order with FSSI OS3

The easiest and fastest way to buy OS3 products is through GSA Advantage!®, an online shopping and ordering system. GSA Advantage! provides access to thousands of contractors and millions of supplies (products) and services. Customers can view and compare a wide variety of products and services, including OS3 products. See the FSSI OS3 Buying Guide [PDF - 82 KB] for a detailed overview of the program, buying procedures, and contact information.

Quick Start Guide

  1. Go to
  2. Log in using your username and password.
  3. On the home page, select “Office Supplies & Equipment FSSI” in the left hand column under “Products.”
  4. Locate the OS3 search bar in the middle of the OS3 page.
  5. Begin your search.
  6. Add items to your cart and check out with your appropriate method of payment.

Why Use GSA Advantage! To Buy OS3 Products?

GSA Advantage! Offers a variety of benefits, including:

  • Step-by-step ordering guide available;
  • Multiple ways to evaluate vendors, products, and pricing;
  • Filters to limit results to green items, small business vendors, toner, and AbilityOne products;
  • Quantity discount pricing;
  • Park Cart feature; and
  • Varied shipping options.

Other Purchasing Channels

GSA Advantage! Is the simplest purchasing channel to use and best for tracking agency spend. However, other channels are available including:

  • Agency virtual stores;
  • Vendors websites;
  • FedMall;
  • Phone, fax, or directly with the vendor; and
  • OS3 pricing for walk-in customers.

Contact National Customer Service Centers (NCSC) by phone at 800-488-3111 or by email at for questions, delivery, or service issues.

print Share Icon Last Reviewed: 2018-09-25