With corellary data regarding non-manufactured but just as mechanical companions.
or:
"How to make new friends...from scratch."

The Engineer is unique among tradesbeings. For many reasons those practitioners of "the greatest art, the grandest science" (© U. Geargrinder) have long been set apart from their counterparts in less technical fields. Either the demands of science, or the cruel whims of physics, or the insistent demands of the local fire brigade have all set Engineers apart from the rest of the world.

But one way in which the Engineer is set above the crowd, and not placed in a containment cell "while the authorities sort this out," is in our ability to craft companions for ourselves, our associate, or the sake of our bookie. Engineers, unique to crafting professions, can learn to produce our own mechanical pets to keep us company. Here we will discuss the various pets available to the tinkerer, and related pets which are too advanced to be crafted by any but the masters of the field.