SY

The SYs are the "Swedish Yankspankers", long time TA hackers probably most well known for the Demo Recorder(A way to record and then play-back games played in Total Annihilation) and their XTA balancing mod. The Demo Recorder eventually began supporting full 3D playback which could be concidered the beginnings of the TA Spring projects. For more information, check their Home Page.

NOTE: I'm sure those who have been into the TA Scene longer could beef this up with a lot more history.