This document discusses cloud computing, including its pros and cons for pharmaceutical companies. It describes the three types of cloud services - Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS). While cloud computing provides benefits like elastic resources and lower costs, it also poses risks around data security, regulatory compliance, and loss of control. The document analyzes specific cloud applications for molecular modeling and considers how cloud computing could be applicable in the pharmaceutical industry.