The IBM Toronto Software Lab is the largest software development laboratory in Canada and IBM's third largest software lab.

Established in 1967 with 55 employees,[1] the Toronto Lab, now located in Markham has grown to employ 2,500 people.

These employees develop some of IBM's middleware.

[2] Some of these include Db2, WebSphere Commerce, WebSphere Customer Center, Tivoli Provisioning Manager, IBM i compilers, and Rational Application Developer.

Originally located in a building at 1150 Eglinton Avenue East in Toronto, the software lab was relocated to Markham on September 11, 2001.