Looking back at the network industry\u2019s most important stories, people and products of the last 20 years as Network World celebrates its 20th anniversary. The long viewHeadlines from early issues of Network World, which we launched 20 years ago this month (March, 2006) touch on everything from broadband LANs to MS DOS 3.1 and the Open Systems Interconnect model. The main goal was connectivity. Today everything is connected but the problem has moved up the stack. The new emphasis is on integrating applications and data. Before we get on with that, here's a look back at 20 years of networking.\u2014 John Dix, editor in chief20-20-20 hindsightLooking back at the network industry\u2019s most important stories, people and products of the last 20 years.20 network-changing products in 20 years20 people who changed the industry20 most important stories of the past 20 yearsThen and now: $20 buys you . . .Well, let's just say one heck of a lot more.A special nod of thanksAl Gore, Bob Metcalfe, Ray Noorda - where would we be without you?Router manDon't be fooled by the Cisco fable. This is the guy who started it all.With new pay, new responsibilitiesNet executive salaries rocket upward as stature grows.20 years in networkingAre you better off today? What was your best tech decision? Your worst? Readers weigh in.Giga flopsNetwork World during the last 20 years.Our editors and columnists nominate their favorite failures chronicled \u2014 OK, hyped \u2014 in Future shockWe ask five futurists to describe the technological changes that are coming our way.Are you a 'Net know-it-all?Test your recollection of the people, companies, technologies and events that made headlines in the network industry over the past 20 years.Advice for the next generation of IT managersHow should today\u2019s IT students prepare for the next 20 years?History lessonsA brief timeline of network industry milestones.