Small to medium-sized businesses use contact management systems (CMS), where a single sales person interacts with the entire client base and they replace CMS with CRM system when their clientele increases. Marketing can be done using CMSs, but with CRM systems one can extract sales data more implicitly. CRM systems allow marketers to target customers that the system has identified by analyzing and CMSs reveal when last time a customer purchased a product or service. Nowadays, vendors advertise their CRM products with features that allow for the integration of CMSs but in reality, data from the contact management software can only be extracted and imported into the CRM system. Read more at: http://it.toolbox.com/blogs/insidecrm/is-it-time-to-integrate-your-contact-management-software-with-your-crm-software-65416