Is a feature in Outlook and Outlook on the web that allows you to assign a keyword or phrase (and color) to help you keep track of items/events. Using this feature you can easily find, sort, filter, or group different items/events that are located across your different folders/calendars.

Services made available to users on demand via the Internet from a cloud computing provider's servers as opposed to being provided from a company's own on-premises servers. Cloud services are designed to provide easy, scalable access to applications, resources and services, and are fully managed by a cloud services provider.

Collaboration Space is a type of notebook in Office 365's Class Notebook app. It is a notebook for all students and the teacher in the class to share, organize, and collaborate.

Contacts are like electronic cards that store a person's information. A contact can be as basic as a name and email address, or include more information like a street address, multiple phone numbers, and a photo.

A contact group -- formerly called "distribution list" -- is a group of contacts that you can send messages, meeting requests and tasks requests.

A contact group/list is a personal group which is stored in your Contacts folder and can contain entries from your personal Contacts and from the Global Address List (GAL).

A Content Library is a type of notebook in Office 365's Class Notebook app. It is a notebook for teachers to share course materials with students. Teachers can add and edit its materials, but for students, the notebook is read-only.