This explains virtualization technologies, specifically virtual machines (VMs) and containers, using the analogy of a pickup truck and its cargo. It begins by contrasting a standalone computer (the truck with a single wooden crate) with the increased capabilities offered by virtualization. The document then clarifies that VMs are complete emulated systems, each with its own OS, akin to a truck towing multiple other trucks with their own payloads. It describes hypervisors (Type 1 and Type 2) that enable their operation. Finally, it introduces containers as a more lightweight solution, sharing the host OS kernel and represented as a truck simply hauling multiple separate boxes, highlighting technologies like Docker and Kubernetes for their management. The source concludes by providing guidelines on when to use each technology, based on factors such as resource intensity, portability, and management scale. It discusses their typical use cases in enterprise and other applications.