Containers are an approach to bundle software in a format that can run isolated on a common operating system. Dissimilar to VMs, containers don't package full operating systems - just libraries and settings required to influence the software work needed. This makes for efficient, lightweight, independent systems and ensures that software will dependably run the same, regardless of where it is deployed. Read more at Devops online Training.
A system of ordering society whereby people are divided into sets based on perceived social or economic status.
A set or category of things having some property or attribute in common and differentiated from others by kind, type, or quality
A Group of people for learning something