You might say these lawyers can get downright technical. Wilson Sonsini Goodrich & Rosati (WSGR) is one of the largest law firms in the US specializing in representing high-tech corporations. Its client roster has included several big Silicon Valley names, such as Apple Computer, Hewlett-Packard, and Sun Microsystems. WSGR has advised hundreds of clients on their IPOs and has been involved in more than 700 merger and acquisition transactions (valued at more than $300 billion) in the last five years. The firm has hundreds of lawyers working across eleven offices in the US and 4 abroad. WSGR was founded in 1961.