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The current day that we live in may seem as a result of rapid innovations and discoveries. But if we venture to trace back the facilities and machines of today, most of them are advances of devices that were built well into the past. Transportation, communication and information exchange all follow the same route of continuous innovation on an invention that dates back hundreds of years ago. Let’s look at some of the greatest inventions that revolutionized history. The Wheel (3500 BC) – Let’s Get Things Rolling Source: When we look back in history, the first invention that changed the future of mankind was the.

Whether its travel or the transportation of goods, the invention of wheels made it much easier than ever before. Wheels were not only used on vehicles in prehistoric times; they were also used in pulley systems.

Surprisingly though, the application of wheels was not primarily used on carts or carriages. Evidence suggests that they were first used as potter’s wheel in 3500 B.C.

Today, wheel and its derivative are present all around us, serving us in easing our efforts and getting the job done! The Compass (206 BC) – The Pathfinder Source: Throughout the history, humans had an unquenchable thirst for exploring the unknown.

But it wouldn’t have been possible without knowing the reference points that helped in identifying the geographical location. This is why compasses were one of the most important tools that helped mankind to explore and record the land and water masses around the world. In today’s world of satellites and GPS, it may seem irrelevant, but it was one of the key inventions that changed the world for better! The compass was to aid in fortune telling, but its scope in travel and navigation was realized only in 11 th century AD. Waterwheel (50 BC) – The Overlooked Invention Source: Water wheels are often neglected from the most notable inventions that changed history.

Each time, he introduces the. 27 Mar RHCSA & RHCE Red Hat Enterprise Linux 7: Training and Exam Preparation Guide (EX and EX), Third Edition by Asghar Ghori not. 27 Mar RHCSA & RHCE Red Hat Enterprise Linux 7 by Asghar Ghori,, available at Book Depository with free delivery worldwide. System Administrator (RHCSA) Complete Video Course and also of the Red Hat Certified Engineer (RHCE) Complete Video Course. He has also written numerous books about different Linux-related topics, and many articles for Linux publica-tions around the world. Sander has been teaching Red Hat, SUSE, and LPI Linux classes since 1994. Free PDF Download Books by Asghar Ghori. RHCSA & RHCE Red Hat Enterprise Linux 7: Training and Exam Preparation Guide (EX200 and EX300), Third Edition. Highlights: > Updated to the latest version of. Rhce 6 Questions And Answers Pdf Read/Download. Followed by review questions/answers I used Asghar other book to prepare for my RHCSA on. View Asghar Ghori’s professional profile on LinkedIn. LinkedIn is the world's largest business network, helping professionals like Asghar Ghori discover inside. This RHCSA and RHCE cert guide is from Asghar Ghori and the author has good experience in Linux and giving tips for the exam. This is the updated version of the previous book from Asghar and cover all the new topics which are objectives of RHEL 7 exam and will help in clearing RHEL 7 exam.

But let’s not forget about the first invention that helped mankind to generate power from sources other than humans and animals. The waterwheel was invented.

It converts the force exerted by flowing or falling water into mechanical energy. This mechanical energy was then used to crush grains, power lathes, drive sawmills, power textiles, forge bellows, and much more. It is reported that there was of them in Europe in 1086. Calendar (45 BC) – Save The Date Source: The modern calendar did not come into use until the 1600s, so there were many forms of calendars that were used to fill in for a unified system. The first form of the calendar used by Egyptians was the.

Then, Julius Caesar brought the Julian calendar that used a 12-month system. But, it had a major flaw as it was off by 11 minutes.

The or the modern calendar we use today was introduced by Pope Gregory XIII in 1582. Pozzolana (27 BC) – The Ancient Concrete Source: We live in a world that is built using bricks and mortar. All the buildings that stand tall from skyscrapers to even the single storied ones use the same combination of materials that keep them together without toppling over – Concrete.

The invention of concrete dates back to ancient Rome. The Romans used a different combination of elements to create a binding mixture than their modern-day equivalent. Uses an aluminous and siliceous mixture which reacts with calcium hydroxide at room temperature in the presence of water to form a substance that has cementitious properties. No wonder why Romans colosseums and cathedrals stood the test of time without losing its beauty or aura!

James Naismith devoted little effort to shaping the evolution of the game he invented, although he spent a decade as the University of Kansas’s founding basketball coach, losing more games than. In partnership with the United States Patent and Trademark Office, the National Inventors Hall of Fame® honors the legacies of visionary U.S. Patent holders. Learn More About Our Inductees Shaping the Future of American Ingenuity.

Clock (725 AD) – the First Mechanical Clock Source: Imagine modern civilization without having a sense of time. A scenario where deadlines don’t matter nor the working hours. Frightening, isn’t it? Time is something that helps us keep track of everything. Humans didn’t invent clock as such, as it was a redesign of the sundial. Sundials were the first devices that man used to keep track of time, and its use dates back as long as.