Science and Technology Fundamentals

Gamma rays are electromagnetic photons with no electric charge, so they do not interact with electric fields. Charged particles like electrons, beta particles, and alpha particles all experience forces proportional to their charge.

Atoms consist of a tiny nucleus containing most of the mass, surrounded by electron clouds that occupy 99.9% of the atomic volume. Since atoms themselves are mostly empty space, any solid object formed from atoms inherits this characteristic.

A hydrogen atom has approximately 1 atomic mass unit (amu), while an oxygen atom has approximately 16 amu. This ratio of 16:1 means oxygen is 16 times more massive than hydrogen.

The atomic number defines an element. Oxygen has 8 protons, so removing 2 leaves 6 protons - which is carbon. The number of protons in the nucleus determines what element an atom is.

The transistor was invented in 1947 at Bell Labs by three scientists: John Bardeen, Walter Brattain, and William Shockley. They shared the 1956 Nobel Prize in Physics for this invention, which revolutionized electronics. Thomas Edison worked much earlier on light bulbs and other inventions, predating the transistor era.

Christopher Sholes invented the QWERTY keyboard layout in 1873 for his typewriter design, which became the standard layout. While keyboard-like input devices existed earlier, Sholes is credited with the modern typewriter/computer keyboard. Constant Martin, Douglas Engelbart (invented the computer mouse), and Ken Thompson are not associated with keyboard invention.

Tim Patterson created QDOS (Quick and Dirty Operating System) in 1980, which Microsoft purchased from Seattle Computer Products and renamed MS-DOS. Patterson wrote the initial code, while Microsoft (led by Bill Gates) adapted, licensed, and marketed it. Gary Kildall created CP/M (a competing OS), Dennis Ritchie developed Unix, and Larry Ellison founded Oracle.

Ada Lovelace is recognized as the first computer programmer for her work on Charles Babbage's Analytical Engine in the 1840s. She wrote what is considered the first algorithm intended to be processed by a machine, making her the pioneer of programming. Charles Babbage designed the computer hardware, but Lovelace created the software concept.

By 2006, email had become a dominant communication method globally, with approximately 50 billion emails sent daily. This reflects the massive growth of digital communication in the early 2000s as internet adoption accelerated worldwide. The number includes both personal and business communications.

In 2010, India had approximately 100 million internet users while Facebook had around 15 million users, giving a ratio close to 20:3. This reflects the early stages of social media adoption in India's growing internet market. The ratio shows Facebook's rapid but incomplete penetration among Indian internet users.

The shebang (#!) is a special character sequence at the beginning of Unix script files that tells the operating system which interpreter to use. It's followed by the path to the interpreter program (like #!/bin/bash or #!/usr/bin/python). This convention is essential for making executable scripts on Unix-like systems.

Dennis Ritchie, co-creator of Unix and the C programming language, is credited with introducing the 'Hello World!' tradition. While Brian Kernighan popularized it in his famous C programming book, the practice originated from Ritchie's early C programming examples at Bell Labs. This became the standard first program for learning new languages.

According to the International Obfuscated C Code Contest (IOCCC), the smallest 'program' is technically zero bytes - an empty file that compiles successfully in C. This exploits C language rules where empty translation units are valid. The contest celebrates creative, minimal, and obfuscated C code.

W3C was founded by Tim Berners-Lee in 1994 and he continues to serve as its Director. The consortium develops web standards like HTML, CSS, and HTTP.

NCSA Mosaic was developed in 1993 at the National Center for Supercomputing Applications. It was the first browser with a graphical interface that helped popularize the World Wide Web.

Ayurveda is the ancient Indian system of medicine, and its origins are traced to the sage Atreya (also known as Atreya Punarvasu), who is considered one of the principal contributors to Ayurvedic knowledge. Otto Hahn discovered nuclear fission, Michael Faraday contributed to electromagnetism and chemistry, and John Kay invented the flying shuttle - none are related to Ayurveda.

William Harvey discovered the circulation of blood in 1628, demonstrating that blood circulates through the body pumped by the heart. Lanchester worked on engineering, J.J. Thomson discovered the electron, and Euclid was a Greek mathematician - none discovered blood circulation.

As of December 25, 2010, Widevine Technologies was Google's latest acquisition, announced in December 2010 for their digital rights management and video optimization technologies. Jambool (social gaming) and like.com (visual search) were earlier 2010 acquisitions. Phonetic Art was not a major Google acquisition.