1000 B.C. - 0 900 B.C. A postal service is used for governmental purposes in China. 500 B.C. In ancient Greece trumpets, drums, shouting, beacon, fires, smoke signals, and mirrors are used for message transmission. 4th century B.C. Aeneas Tacitus' optical communication system Aeneas Tacitus, a Greek military scientist and cryptographer, invented an optical communication system that combines water and beacon telegraphy. Torches indicated the beginnings and the ends of a message transmission while water jars were used to transmit the messages. These jars had a plugged standard-size hole drilled on the bottom side and were filled with water. As those who sent and those who received the message unplugged the jars simultaneously, the water drained out. Because the transmitted messages corresponded to water levels, the sender indicated by a torch signal that the appropriate water level had been reached. The methods disadvantage was that the possible messages were restricted to a given code, but as the system was mainly used for military purposes, this was offset by the advantage that it was almost impossible for outsiders to understand the messages unless they possessed the codebook. With communication separated from transportation, the distant became near. Tacitus' telegraph system was very fast and not excelled until the end of the 18th century. For further information see Joanne Chang & Anna Soellner, Decoding Device, http://www.smith.edu/hsc/museum/ancient_inventions/decoder2.html 3rd century B.C. Wax tablets are used as writing material in Mesopotamia, ancient Greece, and Etruria. 2nd century B.C. In China paper is invented. 1st century B.C. Codices replace scrolls The use of codices instead of scrolls - basically the hardcover book as we know it today - is an essential event in European history. To quote accurately by page number, to browse through pages and to skip chapters - things that were impossible when reading scrolls - becomes possible. In the computer age we are witnesses to a kind of revival of the scrolls as we scroll up and down a document. The introduction of hypertext possibly marks the beginning of a similar change as has taken place with the substitution of scrolls with codices.

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Legal Protection: National Legislation Intellectual property - comprising industrial property and copyright - in general is protected by national legislation. Therefore those rights are limited territorially and can be exercised only within the jurisdiction of the country or countries under whose laws they are granted.

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Individualized Audience Targeting New opportunities for online advertisers arise with the possibility of one-to-one Web applications. Software agents for example promise to "register, recognize and manage end-user profiles; create personalized communities on-line; deliver personalized content to end-users and serve highly targeted advertisements". The probably ultimate tool for advertisers. Although not yet widely used, companies like Amazon.Com have already started to exploit individualized audience targeting for their purposes.

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The Piracy "Industry" Until recent years, the problem of piracy (the unauthorized reproduction or distribution of copyrighted works (for commercial purposes)) was largely confined to the copying and physical distribution of tapes, disks and CDs. Yet the emergence and increased use of global data networks and the WWW has added a new dimension to the piracy of intellectual property by permitting still easier copying, electronic sales and transmissions of illegally reproduced copyrighted works on a grand scale. This new development, often referred to as Internet piracy, broadly relates to the use of global data networks to 1) transmit and download digitized copies of pirated works, 2) advertise and market pirated intellectual property that is delivered on physical media through the mails or other traditional means, and 3) offer and transmit codes or other technologies which can be used to circumvent copy-protection security measures. Lately the International Intellectual Property Alliance has published a new report on the estimated trade losses due to piracy. (The IIPA assumes that their report actually underestimates the loss of income due to the unlawful copying and distribution of copyrighted works. Yet it should be taken into consideration that the IIPA is the representative of the U.S. core copyright industries (business software, films, videos, music, sound recordings, books and journals, and interactive entertainment software).) Table: IIPA 1998 - 1999 Estimated Trade Loss due to Copyright Piracy (in millions of US$) Motion Pictures Records & Music Business Applications Entertainment Software Books 1999 1998 1999 1998 1999 1998 1999 1998 1999 1998 Total Losses 1323 1421 1684 1613 3211 3437 3020 2952 673 619 Total Losses (core copyright industries) 1999 1998 9910.0 10041.5

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Satellites Communications satellites are relay stations for radio signals and provide reliable and distance-independent high-speed connections even at remote locations without high-bandwidth infrastructure. On point-to-point transmission, the transmission method originally employed on, satellites face increasing competition from fiber optic cables, so point-to-multipoint transmission increasingly becomes the ruling satellite technology. Point-to-multipoint transmission enables the quick implementation of private networks consisting of very small aperture terminals (VSAT). Such networks are independent and make mobile access possible. In the future, satellites will become stronger, cheaper and their orbits will be lower; their services might become as common as satellite TV is today. For more information about satellites, see How Satellites Work (http://octopus.gma.org/surfing/satellites) and the Tech Museum's satellite site (http://www.thetech.org/hyper/satellite). http://www.whatis.com/vsat.htm http://octopus.gma.org/surfing/satellites

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Adi Shamir Adi Shamir was one of three persons in a team to invent the RSA public-key cryptosystem. The other two authors were Ron Rivest and Leonard M. Adleman.

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Montage Certain elements of two or more photographs can be put together, mixed, and the outcome is a new picture. Like this, people can appear in the same picture, even "sit at the same table" though they have never met in reality.

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Intellectual property Intellectual property, very generally, relates to the output that result from intellectual activity in the industrial, scientific, literary and artistic fields. Traditionally intellectual property is divided into two branches: 1) industrial property (inventions, marks, industrial designs, unfair competition and geographical indications), and 2) copyright. The protection of intellectual property is guaranteed through a variety of laws, which grant the creators of intellectual goods, and services certain time-limited rights to control the use made of their products.

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