Bootstrap is a "front-end" framework that is used to design websites and web applications. It consists of HTML and CSS and has predefined web elements most commonly used as forms, buttons, navigation bars, and other components.
Source: Wikipedia.org
SCORM (Shared Content Object Reference Model) is a set of standards and specifications for web-based learning technology. It defines communication between the electronic course and the LMS e-learning system.
Source: Wikipedia.org
SCO (Sharable Content Object) is an educational content object. For example, text, image, animation. SCO may have multiple pages where the content is located. SCO can be presented as a study chapter that has pages with educational content.
Menu items (ITEM) form your course menu. If you want a course to work correctly, you must attach each item to an existing SCO study object.
LMS (Learning Management System) is a software application for managing education, documents, tracking and reporting.
Source: Wikipedia.org