Fixed problem with math for number of people, text says 1 in 20 people have color blindness and then it later says that is almost 1 billion people... that would be true if population of earth was 20 billion.
Also fixed one spelling mistake that I noticed.
Added sentence "In order to control the supply of bitcoin, mining is deliberately designed to be difficult and resource-intensive." Also deleted incorrect apostrophe in "Computers".
Added the differences between the working methods of the range() function in Python 2 and 3, including the explanation of the "lazy" method of generating a list of numbers.
Threw in something about what quantum computing could do for database development since they would also benefit greatly from the advancements in performance.
* Fixing typo: Implement the Serialization of a Passport User
Fixing typo in "Implement the Serialization of a Passport User" curriculum page under "Advanced Node and Express" topic
* Fix typo in 'logging a user out' page
Fixing typo in 'logging a user out' page
In addition, i have inserted "be" to the last sentence of the first paragraph. "Comments can also be used for commenting out lines of code for debugging purposes."
* Added section on cost efficiency
Added my considerations on how RAM should also be valued by price, not by it's technical specifications alone but also the practical sense of purchasing RAM within the scope of your potential machine.
* Correct heading level
* new information regarding hello world
## Extra
* you know the first ever program you write was hello world program whether it be in any language.
* It is because Brian Kernighan was the first to write "hello, world" program for the documentation of the BCPL programming language developed by Martin Richards.
* Fixed formatting and improved readability
