Salesforce Glossary of Terms
Salesforce CRM was originally created for Business-to-Business(B2B) companies, so sometimes a little translation can be helpful to nonprofits implementing Salesforce. Check out this glossary of terms for some basic salesforce definitions and translations.

Account: an organization, company, or partner that you want to track — for example, a partner organization, a Foundation, another nonprofit, a school, or a company where your contact is employed. In Salesforce, all contacts are tied to accounts

App: short for “application.” Basically, an app is a collection of components such as tabs, reports, dashboards, and Visualforce pages that address a specific organizational need. Salesforce.com provides standard apps such as Sales and Marketing. The Nonprofit Starter Pack or "Nonprofit CRM" is an app from the Salesforce Foundation. You can create a custom app or download other apps like these from the AppExchange.

Campaign: a series of tactics and/or programs designed to achieve a certain organizational objective. For nonprofits, this objective might be fundraising, calls to action, client outreach, education, volunteer management or raising awareness. And it might include tactics like mass email, events, direct mail, and advertising.
Contact: contacts are those individuals associated with your organization. They can be donors, volunteers, clients, students, etc. Your org can set up multiple contact types. All contacts must be associated to an account unless they are a private "person" account.

Dashboard: A visual representation of your report data. It gives you a real-time snapshot of your outcome measurements and key evaluation indicators. Click on a dashboard to see the report from which it is created. Learn more about dashboards
Household: In the Nonprofit Starter Pack, the Households package provides the ability to group contacts around a physical address, limiting mailings to only one piece per physical address, and aggregating donation and membership information.

Lead: a lead is a potential “sales” opportunity. When you see “leads,” think prospective donors, program participants, members, etc. These are people who might have expressed an interest in your programs, but with whom you have yet to have significant interaction.

Opportunities: an opportunity is a transactional activity that you want to track. For nonprofits, think of opportunities as grant applications, pledge payments, individual donations, product sales, fee-for-service activities, or any other financial transaction. In the Nonprofit Starter Pack, Opportunities have been renamed “Donations.”

Organization (or org): An organization is the virtual space provided to an individual customer of salesforce.com. Your organization includes all of your data and applications, and is separate from all other organizations.

Profile: a profile in Salesforce is a group of settings and permissions assigned to a user. Profiles controls what a user can do in Salesforce. There are standard profiles. Or you can create custom profiles. These are different from an individual Chatter profile.

- See more at: https://powerofus.force.com/articles/Resource/Salesforce-com-Foundation-s-Glossary-of-Terms#sthash.0Qy7mFRo.dpuf