CRM is a massive business. At least an $8 billion industry according to Gartner. Salesforce, the company you think of when you hear CRM (after all, it is their ticker symbol) has a market cap north of $21 billion dollars. And while sales departments are typically most commonly thought of in conjunction with these systems, they’re far from the only adopters of CRM.
In the human resources and recruiting space the equivalent to CRM is the applicant tracking system or ATS. This is also a big business, worth somewhere in the neighborhood of a billion dollars. Taleo, a leader in the ATS market, was recently acquired by Oracle for $1.9 billion. SuccessFactors, another provider of ATS software, was bought by SAP for $3.4 billion.