24th century

The 24th century of the anno Domini (common era) will span from January 1, 2301 to December 31, 2400 of the Gregorian calendar. Unlike most century years, the year 2400 is a leap year, and the first century leap year since 2000.

Predictions

Astronomical predictions set in the 24th century

List of the long total solar eclipses

Other phenomena

Royalty-free

Royalty-free, or RF, refers to the right to use copyrighted material or intellectual property without the need to pay royalties or license fees for each use or per volume sold, or some time period of use or sales.

Computer standards

Many computer industry standards, especially those developed and submitted by industry consortium's or individual companies, involve royalties for the actual use of these standards. These royalties are typically charged on a "per port" basis, where the manufacturer of end-user devices has to pay a small fixed fee for each device sold, and also include a substantial annual fixed fee. With millions of devices sold each year, the royalties can amount to several millions of dollars, which is a significant burden for the manufacturer. Examples of such royalties-based standards include IEEE 1394, HDMI, and H.264/MPEG-4 AVC.

Royalty-free standards do not include any "per-port" or "per-volume" charges or annual payments for the actual implementation of the standard, even though the text of the actual specification is typically protected by copyright and needs to be purchased from the standards body. Most open standards are royalty-free, and many proprietary standards are royalty-free as well. Examples of royalty-free standards include DisplayPort, VGA, VP8, and Matroska.

Production music

Production music (also known as stock music or library music) is the name given to recorded music that can be licensed to customers for use in film, television, radio and other media. Oftentimes, the music is produced and owned by production music libraries.

Background

Unlike popular and classical music publishers, who typically own less than 50 percent of the copyright in a composition, production music libraries own all of the copyrights of their music. Thus, it can be licensed without the composer's permission, as is necessary in licensing music from normal publishers. This is because virtually all music created for music libraries is done on a work for hire basis. Production music is a convenient solution for media producers—they can be assured that they will be able to license any piece of music in the library at a reasonable rate, whereas a specially-commissioned work could be prohibitively expensive. Similarly, licensing a well-known piece of popular music could cost anywhere from tens to hundreds of thousands of dollars, depending on the prominence of the performer(s).