Markup languages include HTML and others like XML. CSS can format markup languages by setting styles. HTML disadvantages include no native support for layouts or media. Common ISPs include Comcast, AT&T, Verizon. Technologies to access ISPs include DSL, cable, fiber, satellite, mobile. UniFi is a networking system that uses wireless and switching technologies. ARPANET was a precursor to the internet starting in 1966, TCP/IP was introduced in 1972 allowing networks to connect, and the world wide web launched in 1991 bringing the internet to the public in 1998.
