Moons of Uranus these five, Titania, is 1,578 km in diameter and the eighth-largest moon in the Solar System, and about one-twentieth the mass the Earth's Moon. The orbits of the regular moons are nearly coplanar with Uranus's equator, which is tilted 97.77° to its orbit. Uranus's irregular moons have elliptical and strongly inclined (mostly retrograde) orbits at large distances from the planet. William Herschel discovered the first two moons, Titania and Oberon, in 1787, and the other three ellipsoidal moons were discovered in 1851 by William Lassell (Ariel and Umbriel) and in 1948 by Gerard Kuiper (Miranda). These five have planetary mass,
Oberon (operating system) 2002.<br> BB, BlackBox Component Builder. Component Pascal IDE from Oberon Microsystems.<br> Bluebottle OS, And again another name for the Active Object System, 2003.<br> BRAM, Block Addressable Random Access Memory, as used in the FPGA machine.<br> CP, Component Pascal. A dialect in the Oberon family most similar to Oberon-2.<br> ETHO, Oberon as developed at Eidgenössische Technische Hochschule (ETH) Zürich.<br> Fox, The compiler for Active Oberon, appearing in AOS (= A2 = Bluebottle).<br> LEO, Linux ETH Oberon. ETHO 2.4.3 for Linux x86.<br> LNO, Linux Native Oberon.<br> NO, Native Oberon. Oberon running on bare hardware rather than atop another operating system.<br> OLR, Oberon