Any moving mechanical device which is moving because of either mechanical energy or electrical energy is called a Machine. The words Machine is connected to various machines but still for devices which are primarily used for interpretation of information generally do not come under the category. For Example Televisions, radios and computers do not come under machine category.  Usually a machine can even be a simple screw and nut and sometimes the most complicated device with unusual structure also. Right from the refrigerator, sewing pump, garage opener to hammer and nail all are classified under the machine category. Compressors, turbines, engines and even printing press are machines though they may be simple or complicated. Machines are created using special structures also known as machine tools which are structured to be mechanized and motion with the help of series of actions. Most of the machines are computerized and some of the machines are monitored by the computer, when they are motion sensed using special computer cameras. Shapers, lathes, hammers and screws are all items included under the category Machine tools. Machines which have special motions structured onto them are called robots. Robots are specially designed structures which are meticulously designed because the duties they perform are with utmost care and accuracy.

Agriculture was born, when humans found a permanent place to settle and started to civilize, in fact agriculture was the first step of man towards civilization. Cultivation of fields is the meaning of the Latin word agriculture. Raising both livestock and crops are known as Agriculture. The growth of this new way of producing was slow .But as time passed, people realized that it made life much easier for them than the previous lifestyle, thus agriculture started gained prominence. Farmers, was the name given to the people who were engaged in agriculture. Before the rise of farmers, the society was not the same as it is today; all the people engaged themselves in finding food and water. Fishing, hunting and collecting food was a routine for all the people. So, it was a situation where then was abundant food it was famine and when there was no food it was famine. Slowly and eventually, the benefits of growing and taking care of the animals and livestock were realized by the people. The availability of raw materials was abundant because there was a reliable supply of food and grains, So, people also engaged in other activities other than hunting and fishing.

The apple is called the King of Fruits because of its fine qualities and attractive features. The fruit almost grows everywhere, more than any other tree on earth. Because of its sustainability in cold conditions, the fruit was the only dependable food before cold storage facility was invented .The fruit has a spicy aroma, with crispy and juicy inner layers and bright red as a cover skin. Apple is delicious when cooked and is even more delicious when it is eaten raw. One of the famous juices in the world includes both apple juice and cider. They are prepared as jelly, apple butter and canned as frozen juice, so they are successful in commercial activities as well. In the apple, there are lots of minerals, vitamins and also carbohydrates which are useful digestive components for human body. In apple one sixth of its contents are solid and the rest contains water .Though there are thousand of varieties of apples present on the earth, there are only few which are grown for commercial purposes. For apples the big harvest time is in October. Many varieties of apples are stored in freezing conditions to retain them until next summer.

A problem in thinking caused by the disorder of early development is known as Autism, in this problem the affected will have a problem communicating with others and also live in their own world. autos, a Greek word is known as alone in English, In this case the children find it difficult to build a relationship socially and sometimes even with their parents. This disorder must not be confused with mental retardness and other mental disability, though the behavior of these types of children resembles mental disorders The first symptoms of autism always occur in the first year of a child, this is called as infantile autism. But in some special cases autism develops even at the age of 12 years. This disorder is most common in boys, as for every girl affected with autism there are at least four boys affected. There is no specific reason or creed where this order can occur, autism occurs in a child irrespective of caste, creed or ethnicity. There are at least four lakh people affected by autism in the United States of America. Most of the autistic children repeat the words that they hear and some children remain totally silent. The attention span of these children is very short.

Autobiography is nothing but the story of an individual written by him spanning from his interests and important events in his life. Biography and autobiography are different from each other as autobiography is a record of the writer on how he views himself and wants the readers to understand him. The chronological events of his life recorded in diaries, notes and most important his memories are the one which helps him write the autobiography. Something similar to the autobiography is one called memoir, which is usually written by people who have involved themselves in public life, like Prime ministers and presidents write memoirs. The memoir is different in many aspects when compared to autobiography, as autobiography covers the character description and reaction of an individual to the special events of his life, but memoir just specifies special events of a writer’s life and also how the event affected the life of writer’s life. Memoirs are usually written by most of the presidents, like Harry Truman who justified his actions during the office, so it is a brief of the events and the action taken by them prior t the events. Thus autobiography covers more or less all the events of the writer’s life recorded by him.

The great blue whale and pygmy shrew are common in one way despite their size and structure and shape: They are warm blooded, air breathing and vertebrae, in single word; they belong to the family known to us as Mammalia, or mammals. Mammals are considered to be the most developed creatures when compared to other creatures in the world. The word mammals itself sets apart the developed race of creatures from other species in the world. The word mamma which is of Greek descent means breast. Every mammal female has a special gland which secretes milk for its little ones; this special feature sets apart the mammals from other creatures. The mammals bear the little one alive inside their stomach. The little ones after being born are fed with milk by the mother until they learn to feed themselves. One special feature of a mammal are the hairs, however in whale they appear only in the fetal stages of its life, but there can be exceptions in this as whale is a water animal. One more important feature of mammals are itheir higly developed brain which is also more complex compared to other creatures. Thus mammals set them as the most developed creatures of the world.