Please discuss the following topics and provide substantive comments to at least two other posts. Select from the following list four (4) topics and discuss. Use only 50-words max per topic to discuss and present your answer.  The discussion questions this week are from Chapter 2  (Jamsa, 2013).
Chapter 2 topics:

Define and describe SaaS.
Discuss a SaaS provider for each of the following: “Sales and customer relationship management
Accounting
Income tax filing
Web-Based Meetings
Human Resources
Payroll Processing
Backup Automation
Office Document Creation
Social Networking
Define and describe mashups.
List the advantages and disadvantages of SaaS solutions.
Describe the role of OpenSaaS.
Compare and contrast a web service and a SaaS solution.
Define and describe SOA.

NOTE: You are required to use at least two-peer reviewed sources (besides your textbook) to answer the above questions.