M4 corridor

[2][3] Important cities and towns linked by the M4 include (from east to west) London, Slough, Bracknell, Maidenhead, Reading, Newbury, Swindon, Bath, Bristol, Newport, Cardiff, Port Talbot and Swansea.

[4] Technology companies with major operations in the area include Adobe, Amazon, Citrix Systems, Dell, Huawei, Lexmark, LG, Microsoft, Novell, Nvidia, O2, Oracle, Panasonic, SAP, and Symantec.

The east end of the English M4 corridor is home to a large number of technology companies, particularly in Berkshire, Swindon and the Thames Valley.

Reading is home to many information technology and financial services businesses, including Cisco, Microsoft,[6] ING Direct,[7] Oracle,[8] Prudential,[9] Yell Group[10] and Ericsson.

[25] The opening of the Second Severn Crossing in 1996 resulted in the previous M4 and bridge, serving Chepstow, being renumbered the M48, although the area is still generally considered as falling within the M4 corridor.

Reading International Business Park. This crescent of offices beside the A33 are home to Verizon , a telecommunications company. They were formerly the European headquarters of WorldCom before its demise
The Second Severn Crossing carries the M4 motorway between England and Wales
The Digital Technium at Swansea University