Many contractors use TRA-SER as a stand-alone pricing resource, but most companies use the program in conjunction with one of their business applications, such as estimating, billing, inventory, or accounting. Most of the industry's application software providers have written effective links to TRA-SER, enabling the databases within their programs to be kept current and accurate. Trade Service is pleased to recognize and display the names of those companies who have taken the important step to link to the TRA-SER product line, giving them the ability to promote a combined solution to their customers that adds substantial additional value.