Ha'olam

Ha'olam was a human colony world in the 23rd century. While originally established by humans, they shared the world with Lacaillans and Caxtarid. Most of the planet was either desert or savannah, with large cities containing almost the entire population. The planet was located near Mu Camelopides VI and Occam's World. (PROSE: Dreamstone Moon)

History
The colonists of Ha'olam used ornithopters as a public transport service.

Sam Jones spent three years on Ha'olam while separated from the Eighth Doctor, starting in 2202. The Doctor also spent three years on Ha'olam at the same time. He spent the majority of the time in a prison: the Oliver Bainbridge Functional Stabilisation Centre. This was the nicer of two prisons. The other one on the planet was the Brian Lindsey Memorial High Security Correctional Facility. (PROSE: Seeing I)

Behind the scenes
In Hebrew, ha'olam (העולם) means "the world." Judging by this and by the use of both Hebrew and Arabic on the planet, it is safe to assume that the planet has Jewish/Hebrew origins.