Practical Law Company (or PLC) is a UK-based legal publishing company which provides legal know-how for business lawyers.It also acts as secretariat for the GC100 group of general counsel and company secretaries.According to the AmLaw Daily, The company was set up in the early 1990s by Chris Millerchip and Rob Dow to publish PLC Magazine.ince then it has expanded to provide predominantly web-based subscription services to law firms and law departments across a range of specialist subject areas such as corporate, finance, property, tax and intellectual property.