History of Bulgaria - Part I

Bulgaria is the site of one of the world's oldest civilizations, and the oldest known writing system (the Gradeshnitsa Tablets which date to at least 4000 BC).

In early classical times the territory of Bulgaria was inhabited by the Thracians. The Thracians were divided into various tribes, but eventually united as the Odrysian kingdom under King Teres in the 5th century BC. The region was invaded by the Romans in 188 BC, and wars continued until 45 AD when Thrace became a Roman province.

Beginning in the 2nd century AD, a semi-nomadic people, the Bulgars, began to migrate towards the West from Central Asia. By the 4th century, the Bulgars had settled in the lands to the North of the Black Sea, around the Sea of Azov, and by the 7th century had established a state known as "Great Bulgaria" or "Onoghuria" in the region. Later in the 7th century, one tribe of Bulgars moved West, defeated the Byzantine empire in a war, and were recognized in the subsequent peace treaty with the Byzantines as an independent state in 681.

The First Bulgarian Empire was established under the warrior Khan Krum (802 to 814) who conquered a number of lands in the Balkans. The empire eventually encompassed all of present day Romania, as well as parts of Serbia, Macedonia, Albania and Greece. It was during this period the Cyrillic alphabet was adopted, and Christianity was introduced to the Bulgarians.

The Byzantine Empire ruled Bulgaria from 1018 to 1185, but after a revolt in 1185, a Second Bulgarian Empire was established. However, this Empire was relatively short lived. In 1354 the Ottoman Turks crossed into Europe, and by 1396 had conquered the whole of Bulgaria.

The History of Computer Based Flight Training

Computerized flight simulation turned into a reality in the early 1980's when the first personal computer devices were developed along with console games. In such an early stage, computer based pilot training was an unimaginable thing.

David Clark headsets and communication solutions were totally out of scope, but in the mind of visionaries that eventually developed the first computer-based flight training systems.

Aviation supplies and vehicle intercom systems were incorporated too simulators to provide a virtual like experience in pilot training programs.

However, if we look back, aircraft supplies and flight simulation appeared almost at the same time: the early history of real flights. In the early days, it was more convenient to teach the pilots from the earth, but feeling as if they were in airborne.

Historic records talk about an aircraft that was mounted on a universal joint to provide a flight simulation: the Sanders Teacher. Later in 1910, another simulator aircraft was built, although there is no registry of its name.

Some stores where aviation supplies are available have pieces of aviation history hanging on their walls. Some David Clark headsets also feature part of such historic background, depicting modern headset accessories and original equipment of the days in the past.

Throughout the 20th century, different aircraft supplies were developed, followed by numerous flight simulators that were invented in those days, but particularly during World War II. Pilot training occurred in both airborne and on ground, including the times when the space era arrived.

It was not until the last decade of the century when computerized pilot training acquired real importance. The 8-bit flight simulator games were transformed into combat simulators in which a player was able to choose aviation supplies to configure the aircraft, but the flight simulation was just a game.

More and more developers began to create more computer based flight simulators, until they became computer based flight training with the turn of the century. Stores were David Clark headsets were available, began to display the innovative courses for pilot training that we know today.

In a computer based flight training program, students can learn about aircraft supplies or just take the pilot training course designed for learning at affordable price, but simulating all the situations that a real airplane will face while crossing the sky.

Realistic flight simulation training also includes all the aviation supplies that any student might need in a real flight, as well as David Clark Headsets to wear during the training, so the experience resemble the real situations in the air.