A hard drive or SSD in a case that connects to a computer, usually via USB.

The standard ebook format. Supports flowable text content with images and formatting.

The most essential internet communication tool. You’ll need an email address for most online services.

A wired networking technology for connecting devices in a LAN, usually via Cat5 or Cat6 cables.

Scrambling data so it can only be read with a special key. A must for sensitive info.

Eratosthenes (circa 275–194 BC) was a famous Greek mathematician, astronomer, and geographer, born in Cyrene, Libya. His most celebrated achievement was pioneering a method for measuring the Earth's circumference, calculating a result with less than 5% error, and he was the first to propose the term 'geography,' earning him the title of 'Father of Geography' in later generations.

Albert Einstein was one of the greatest physicists of the 20th century, proposing the theory of relativity and the mass-energy equivalence equation, and he won the 1921 Nobel Prize in Physics.