Wednesday, August 20, 2008

Apple

The apple is the pomaceous crop of the apple tree, species Malus domestica in the rose family Rosaceae. It is one of the most broadly cultivated tree fruits. The tree is small and deciduous, reaching 5 to 12 metres tall, with a broad, often tightly twiggy crown. The leaves are alternately agreed simple ovals 5 to 12 cm long and 3–6 centimetres broad on a 2 to 5 centimetres petiole with an acute tip, notched margin and a slightly downy bottom. Flowers are shaped in spring simultaneously with the promising of the leaves. The flowers are white with a pink tinge that repeatedly fades, five petaled, and 2.5 to 3.5 centimetres in diameter. The fruit mature in autumn, and is typically 5 to 9 centimetres diameter. The centre of the fruit contain five carpels set in a five-point star, each carpel contain one to three seeds.

The tree originates from Central Asia, where its natural ancestor is still creating today. There are more than 7,500 known cultivars of apples resultant in range of preferred characteristics. Cultivars vary in their yield and the definitive size of the tree, even when mature on the same rootstock.

At least 55 million tones of apples were grown universal in 2005, with a value of about $10 billion. China shaped about 35% of this total. The United States is the next leading producer, with more than 7.5% of the world invention. Turkey, France, Italy and Iran are among the important apple exporters.

Wednesday, August 06, 2008

CD-ROM

CD-ROM (an abbreviation of "Compact Disc read-only memory") is a Compact Disc that contains information accessible by a computer. While the Compact Disc format was formerly designed for music storage and playback, the format was later adapted to hold any form of binary data. CD-ROMs are commonly used to distribute computer software, including games and multimedia applications, though any data can be stored (up to the capacity limit of a disc). Some CDs seize both computer data and audio with the latter capable of being played on a CD player, whilst data (such as software or digital video) is only usable on a computer. These are called Enhanced CDs.

Although many people use lowercase letters in this acronym, proper appearance is in all capital letters with a hyphen between CD and ROM. It was also suggested by some, specially soon after the technology was first released, that CD-ROM was an acronym for "Compact Disc read-only-media", or that it was a more 'correct' definition. This was not the purpose of the original team who developed the CD-ROM, and common acceptance of the 'memory' definition is now almost universal. This is probably in no small part due to the prevalent use of other 'ROM' acronyms such as Flash-ROMs and EEPROMs where 'memory' is the correct term.