Chromium OS. Chromium OS is an open-source project that aims to build an operating system that provides a fast, simple, and more secure computing experience for people who spend most of their time on the web. Here you can review the project's design docs, obtain the source code, and contribute.
1 Common orange â There are many varieties of common orange and it is widely grown. 2  The most common varieties of common oranges are the Valencia, Hartâs Tardiff Valencia, and the Hamlin, but there are dozens of other types.
Oranges are a kind of citrus fruit. The common orange is nearly round in shape with an orange skin and orange flesh. Oranges and tangerines are both citrus fruit. Citrus fruits have thick, leathery, pitted, skins or rinds.A citrus fruit has a pulpy, juicy inner flesh.emons grow only in warm subtropical and tropical climates. A lemon is a kind of citrus fruit. Citrus fruit has a pitted rind and a pulpy, juicy center. The pulp is usually tart or sour.Lemons trees need a lot of sunshine, rain and rich soil. Lemon trees are grown in groves such as the one in the picture to the right.