The UK headquarters of Mars, Incorporated is in Slough, the main factory having been established in 1932 by Forrest Mars Sr. and Frank C. Mars. It produced the Mars Bar in Slough over 70 years ago. One of the Mars factories has been demolished and some production has moved to the Czech Republic. The European head offices of major IT companies such as BlackBerry, McAfee, Computer Associates, PictureTel and Compusys (among others) are all in the town. O2 is headquartered in the town across four buildings. The town is also home to the business support organisation Thames Valley Chamber of Commerce Group and National Foundation for Educational Research, which is housed in the Mere.