Open Source is computer software whose source code is made available for use or modification as users or other developers see fit. To summarize, the software can be redistributed to anyone else without any restriction. The source code must be made available so that the receiving party will be able to improve or modify it as per their requirements.
CRM stands for Customer Relationship Management. CRM combines all the business processes, people, and technology to achieve this single goal: getting and developing stronger relationships with customers. It’s very hard to run a successful business without a strong focus on CRM. After all, its all about the customer.