Following the 1980s a sweeping restructuring of commercial media power has happened. While some firms have grown through expansion others extended through mergers and acquisitions. Examples are
In recent years those developments have led to the rise of transnational media giants, resulting in the domination of the global media system by about ten huge conglomerates. These have interests in numerous media industries, ranging from film production, magazines, newspapers, book publishing and recorded music to TV and radio channels and networks, but also include retail stores, amusement parks and digital media products.
Behind these firms are about three or four dozen smaller media companies, which primarily engage in local, national or niche markets. In short, the overwhelming majority of the world's content production facilities and distribution channels lies in the hands of approximately fifty enterprises.
TEXTBLOCK 1/1 // URL: http://world-information.org/wio/infostructure/100437611795/100438659096
This document, intended as a reliable electronic reference tool, provides a timeline for three types of developments and milestones: (1) advances in long distance person-to-person communication; (2) advances in storage, replication, cataloguing, finding, and retrieval of data; and (3) standardization of concepts and tools for long distance interaction.
The advancements may have a technical (hardware), conceptual (software), or an organizational aspect, or represent an important milestone in the history of a given invention, and are annotated as such in the timeline.
The period covered ranges from 30000 BC up to now.
http://www.ciolek.com/PAPERS/milestones.html