Some websites are made for a certain purpose. These websites, such as Facebook and Youtube, can also be likened to web applications (which would be downloadable applications of a certain function) as they are mostly single-purpose sites and so would only be used by people with a certain mindset which, in the case of Youtube, would be to watch videos as Youtube is one of the most popular video viewing and sharing websites.
HTML5 is a markup language for structuring and presenting content on the internet. The last HTML in its series was HTML4, which was standardised in 1997. Since then, however, other markup languages have become prevalent such as JavaScript, XHTML, DHTML and many more. HTML5, however, is the newest and possibly best of the current generation and is made to be 'future-proof' and universal; it would be the same for each different language. It is said that HTML5 is still under development so the current version we are seeing is unfinished and not to its full potential.
Java is a programming language which is the successor to C and C++. Having been influenced by many other previous programming languages, it is somewhat of a group-together of those and as such it has also influenced many more. Java was designed by James Gosling and Sun Microsystems, the company that distributes it to this day. Java was selected by Google and Android, Inc. to be used for the Android Operating System, which is an operating system made for smartphones.
Ecommerce (or E-Commerce) is Electronic Commerce. Ecommerce is the act of buying or selling anything online. For example, sites such as Amazon.com and Ebay.com have the primary function of Ecommerce: The purpose of those sites is to buy and sell items online. The only difference between the two is Amazon items are mostly sold new, whereas Ebay is popular as a place to sell old or unused items. Ever since online shopping has existed, so has Ecommerce. Online shopping was created by Michael Aldrich in 1979 and as such, he created Ecommerce.
Cookies, also known as HTTP Cookies, web cookies or browser cookies, are small pieces of information stored inside a web browser (such as Google Chrome, Firefox, etc.). Sometimes, cookies have to be accepted, by a pop-up menu asking for them to be allowed, but often, cookies are more of a 'background job', simply being done silently without you knowing. Cookies cannot carry viruses or malware (malicious software) so they are usually harmless, but certain cookies called tracking cookies can be used to gather and store data on users - something which is frowned upon, as it is seen as an invasion of privacy in a way.
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