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Can you imagine life without a mobile phone? From the large Motorola StarTAC of the 90s to Apple's sleek and smart iPhone, mobile phones have transformed into an absolute necessity in today's connected world. Ask questions about these ubiquitous devices here.

War and Military History encompasses the causes and effects, the courses and actions, the good and the bad, of warlike activities - from the earliest of times to present actions.

Everyone knows that salary and pay rates has to do with the compensation one receives for the work they perform. Determining what careers and what locations provide the best salaries and pay rates helps job hunters line up expectations and provides assistance in making decisions. Ask questions about compensation here.

Many organisms, such as humans, ingest food to get the nutrients needed to maintain life. Cooking and preparation are often a necessity, but also a joy for many people. The Food and Cooking category includes questions and answers on the ingredients in food, recipes, nutritional information, cooking utensils, where to find certain foods, and much more. Bon Appetit!

Ever wanted to know the difference between a boysenberry and a blueberry? socialism and communism? Windows and Linux? Look no further. This category answers your questions about 'The Differences Between...'

Length refers to the measurement of an object from one end to another, while distance is the space between two objects or points. The two systems used to measure length and distance are the English and metric systems.

This category includes questions and answers about computers and everything related to computers.

DIY, or do it yourself, is a wide range of projects you may decide to pick up around your house. Many types of home repair or home improvement can be done by the home owner, with the right knowledge.

Find questions about how different mechanisms originated and the people who came up with the ideas and put them into reality.

Lakes are huge water bodies that hold a large amount of fresh water. Rivers are water bodies that flow according to gravity, usually ending at a larger body of water such as the sea or ocean.

Meteorology is the science which deals with the phenomena of the atmosphere, especially weather and weather conditions. It involves the study of the character of the atmosphere and the events and processes within it, together with the interaction between the atmosphere and the face of the earth. Weather, of course, is what occurs on the surface of the earth from day to day, whether that be rain, sunshine, heat or cold, or whatever the outside conditions are.

The practical application of knowledge, especially in a particular area, is called technology. Advances in technology affect every area of our lives. This category is for questions about technology and includes everything from how to remove a scratch from a CD to applications of electronics to what polyester is made from and more.

From the beginning of time man has never been satisfied to stay in one place. Forever curious, individuals and groups have set out on new and wondrous voyages throughout history. Their stories and information can be found here.

Planetary Science is the study of Planets and the Solar System, a combination of Astronomy and Earth Sciences. Find questions about the different planets and more.

Includes questions about words that have similar and opposite meanings.

Have you ever wondered how to make clothing, or what sort of clothing is suitable for what time? How cleaning clothes properly? All questions about clothing are welcome here.

The movement or transfer of people from one location to another through a journey is travel. Planes and trains will take you far, but wherever you go, there you are! Whether you're traveling across a state or around the world, questions about locations, travel times, and anything related to traveling should be asked in this category. Happy traveling!

The struggle that freed the colonists from British Rule, the American Revolution took place from 1776 to 1781.

Ever since money was invented, we've been involved in business and financial transactions. Questions here are about all commercial, financial and industrial activity related to the economy, investing, and stock markets. This includes questions and information about production and manufacturing, exchange and distribution of goods or commodities, and management of money and other assets.

Weight and mass are two commonly misunderstood terms in fluid mechanics and mechanics. Weight is the measurement of the gravitational force on an object, while mass is the measurement of the amount of matter in an object.

The Roman empire spanned throughout Europe and Northern Africa. It stood from 44 BC to 286 AD. The Roman empire witnessed the time of the gladiator as well as a significant shift in religious views.

History consists of studying the past. It is a branch of the humanities or social sciences.

Translating English words into Spanish. How you say and spell English language words and phrases in the Spanish language.

Athletes is a category that discusses the activities and lives of famous athletes. Ask questions about your favorite athlete here.

Entertainment and Arts provide us with diversion and pleasure that make life a true joy. Whether it is through movies, music, games, or theater, the arts have a way of touching our souls. Questions in this category have to do with all types of entertainment, including the arts, media, modern and historical entertainment, as well as the effects of entertainment and arts on our society.

The distance in miles or kilometers driving on roads from point A to point B

Our canine companions. Truly man's best friend. Breeds, health, training and so many more questions go here.

Dining establishments include bistro, buffet, cafe, cafeteria, restaurants, pub, fast food and coffeehouse. They differ from the food they serve, preparation methods, pricing, as well as the ambience of the place.

Questions about the structure of atoms/molecules and the resulting properties such as shape, polarity, and number of subatomic particles.

American movies are rated by the Motion Picture Association of America. Wondering whether a movie is rated G, PG, PG-13, R or NC-17? Ask so here.