Jack is one of Bart’s early clones. Along with Owen and Issac, he pilots one of the first three colony ships from Sol to 82 Eridani. One of the ships is Exodus 43, and all of them transport refugees from the enclaves in Vancouver Island and Japan.
Jack wears more casual clothing than most Bobs’ standard ensemble of trousers and a buttoned shirt: his VR presence wears t-shirts and jeans. He also has the typical Bob VR environment of a living room / library, without personalization.