Let's extend the building block metaphor into a desk metaphor. We can think of a workspace as a desk: a place to work with our building blocks. It has "drawers" to keep the blocks, "shelves" to assemble our services, and a "work surface" of environments for development.
In the initial release of Polylith services were called systems, and systems were called ecosystems. The documentation has been updated to reflect the new names, but the images still reflect the original naming.
Let's take a look inside the first "drawer", where we keep all the bases.