PCA tries to find mutually orthogonal components whereas in ICA the components may not be orthogonal. ICA searches for mutually independent components. PCA tries to maximize the variance of the input signal along with the principal components, while ICA minimizes mutual information in found components.
Data are just symbols that represent stimuli or signals. Information is data that has meaning and purpose. Knowledge is information that has been processed, organized, or structured in some way, or put into practice in some way. Wisdom is integrated knowledge so information that is made super-useful.
Both ASCII and Unicode are encoding standards. ASCII is an initial standard that was first published in 1963, whereas Unicode is a larger standard. Unicode standards are implemented by either UTF-8, UTF-16, or UTF-32. ANSI is a misnomer of a Windows encoding standard but is not recognized by ANSI itself.
A system’s IT infrastructure is the set of components, while its IT architecture is how they work together. Simply put, a system is built on top of an IT infrastructure that has a specific IT architecture.
A fixed VoIP is an internet-based phone line corresponding to a specific physical address. A non-fixed VoIP is another internet-based phone line, but it does not correspond to a particular address. Both come with benefits and neither is inherently better than the other as different situations call for separate systems.
There is no universal definition for ICT, but it is generally agreed that it has more to do with communications between people than IT does. While IT deals with computer systems, ICT is more inclusive of technology that allows you to communicate with others and is a direct extension of IT.
A webpage is an HTML document that displays content as part of a website. A website is a collection of related webpages.
The main difference between a search engine and a web browser is what they do. While a search engine provides an index of content on the internet in order to provide relevant results to users’ searches, web browsers allow users to browse through different websites by generating graphical content.