This is the original cryptonote paper written by the cryptonote team. Reading it will give an understanding about how the cryptonote algorithm works in general.
This dev-focused workgroup coordinates the development of the website. Most members are also part of the Development Workgroup. The Website Workgroup was mostly created to have discussions related to the website all in one place.
This is a POS-like page that merchant can easily use to set the amount of XMR to receive. If the 'Sale tracker' option is enabled, you will see the payments while they arrive in real time in your wallet, along with the number of confirmations.