www.caleromdsl.com WHITE P APER The History , Evolution and Future of SaaSPAGE 1 Table of Contents 2 It’s Not the Hardware, it’s the Software 2 Application Delivery & Software Streaming 3 A Brief Stopover in the 1990’s 3 A False Start 4 Along Comes Cloud Computing 5 5 SaaS Billing Models 6 Mainstream SaaS The Most Important Layer in the Cloud Model is Often Overlooked ©2021 Calero-MDSL. All Rights Reserved.PAGE 2 Long before the introduction of the Apple Computer, the IBM Personal Computer taught us that software is something that comes packaged in shrink-wrap, software was delivered as a service from “service bureaus” that enabled connected “dumb terminals” to “time-share” on their mainframe systems. In 1960 John McCarthy, the same Stamford/ MIT professor who

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