Years ago, customer information was kept on rolodex cards or ledger sheets. Today the web-based equivalent is the Customer Relationship Management (CRM) system. They're still about as exciting and visually appealing as a rolodex card, but just as invaluable. For instance, in our business, all our customers contact information is in our CRM, as well as their website information: who the name registrar is, what Joomla components they have installed, which software licenses they've paid for, etc. This enables any of our team members to gain access to this critical information wherever they are.