OASYS was a trademark

Trademark

A trademark, trade mark, or trade-mark is a distinctive sign or indicator used by an individual, business organization, or other legal entity to identify that the products or services to consumers with which the trademark appears originate from a unique source, and to distinguish its products or...

ed US

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

-financial markets trade confirmation service developed by Thomson Financial

Thomson Financial

Thomson Financial was an arm of The Thomson Corporation, which was one of the world's leading information companies, focused on providing integrated information solutions to business and professional customers...

 in 1991. It has been updated on a regular basis and is now known as Omgeo OASYS (service marked) and owned since 2001 by Omgeo LLC a joint-owned company of Depository Trust & Clearing Corporation (DTCC) and Thomson Reuters

Thomson Reuters

Thomson Reuters Corporation is a provider of information for the world's businesses and professionals and is created by the Thomson Corporation's purchase of Reuters Group on 17 April 2008. Thomson Reuters is headquartered at 3 Times Square, New York City, USA...

.

The OASYS system is one example of Electronic Trade Confirmation, a mid-office service performed by brokers. It supports a 3 stage allocation process.

• Advice of Execution - the client is informed of the volume and cost of financial instrument traded in their behalf
• Trade Allocation (optional) - the broker is told break the order into smaller blocks
• Confirmation - the client is informed of the new blocks