Online trading of securities has been growing and is most likely to continue on that path. This means that the buy-side traders need to revisit their software. They are doing that by buying new Execution Management Systems (EMSs). The new EMSs, however, don't always integrate well with the more traditional and function-heavy Order Management Systems (OMSs). The traders are looking for better systems overall. Wall Street & Technology : Buy-Side OMSs Face the EMS Threat