A mobile app is a computer program designed to run on a mobile device such as a phone/tablet or watch.

A blog (a truncation of the expression "weblog") is a discussion or informational website published on the World Wide Web consisting of discrete, often informal diary-style text entries ("posts").

Posts are typically displayed in reverse chronological order, so that the most recent post appears first, at the top of the web page.

Until 2009, blogs were usually the work of a single individual, occasionally of a small group, and often covered a single subject or topic.

In the 2010s, "multi-author blogs" (MABs) have developed, with posts written by large numbers of authors and sometimes professionally edited.

MABs from newspapers, other media outlets, universities, think tanks, advocacy groups, and similar institutions account for an increasing quantity of blog traffic.

The rise of Twitter and other "microblogging" systems helps integrate MABs and single-author blogs into the news media.

Blog can also be used as a verb, meaning to maintain or add content to a blog.

A computer is a device that can be instructed to carry out sequences of arithmetic or logical operations automatically via computer programming.

Modern computers have the ability to follow generalized sets of operations, called programs.

These programs enable computers to perform an extremely wide range of tasks.

Terms of service (also known as terms of use and terms and conditions, commonly abbreviated as TOS or ToS and ToU) are rules by which one must agree to abide in order to use a service.

Terms of service can also be merely a disclaimer, especially regarding the use of websites.

Technology ("science of craft", from Greek, techne, "art, skill, cunning of hand"; and) is first robustly defined by Jacob Bigelow in 1829 as: "...principles, processes, and nomenclatures of the more conspicuous arts, particularly those which involve applications of science, and which may be considered useful, by promoting the benefit of society, together with the emolument [compensation] of those who pursue them".