Notable enterprises which produced discs of such software are BBC PD, Electron User Group and HeadFirst PD.

German brass making crucibles are known from Dortmund dating to the 10th century AD and from Soest and Schwerte in Westphalia dating to around the 13th century confirm Theophilus ' account, as they are open-topped, although ceramic discs from Soest may have served as loose lids which may have been used to reduce zinc evaporation, and have slag on the interior resulting from a liquid process.

Backgammon playing pieces are known variously as checkers, draughts, stones, men, counters, pawns, discs, or chips.

The discs are roughly checker-sized, slightly smaller in diameter than the board's central hole, and often have concave faces to reduce sliding friction.

If there are any enemy discs on the board, a player must make contact, directly or indirectly, with an enemy disc during the shot.

When there are no enemy discs on the board, many ( but not all ) rules also state that a player must shoot for the centre of the board, and a shot disc must finish either completely inside the 15-point guarded ring line, or ( depending on the specifics of the rules ) be inside or touching this line.

Chloroplasts are observable as flat discs usually 2 to 10 micrometres in diameter and 1 micrometre thick.

The CD and its extensions are successful: in 2004, worldwide sales of CD audio, CD-ROM, and CD-R reached about 30 billion discs.

Even higher capacities on non-standard discs ( up to 99 minutes ) are available at least as recordables, but generally the tighter the tracks are squeezed, the worse the compatibility.

* Vehicle ceramic brake discs are resistant to abrasion at high temperatures.

There are different designs of vehicle clutch but most are based on one or more friction discs pressed tightly together or against a flywheel using springs.

There are also 90 minute / 790 MB and 99 minute / 870 MB discs, although they are less common ( and depart from the Orange Book standard outright ).

Some drives use special techniques, such as Plextor's GigaRec or Sanyo's HD-BURN, to write more data onto a given disc ; these techniques are inherently deviations from the Compact Disc ( Red, Yellow, and / or Orange Book ) standards, making the recorded discs proprietary-formatted and not fully compatible with standard CD players and drives.

Therefore, discs with capacities larger than 650 MB, and especially those larger than 700 MB, are less interchangeable among players / drives than standard discs and are not very suitable for archival use, as their readability on future equipment, or even on the same equipment at a future time, is not assured, even under the assumption that the discs will not degrade at all.

Canadian Forces identity discs ( abbreviated " I discs ") are designed to be broken in two in the case of fatality ; the lower half is returned to National Defence Headquarters with the member's personal documents, while the upper half remains on the body.

The brake discs are not mounted at the wheels as on conventional automobiles, but are inboard, attached to the outside of each differential.

It has a distinctive appearance with two large contra-rotating discs mounted in a vertical plane, two crossed bars with metallic brushes, and a spark gap formed by two metal spheres.

The conducting shafts that hold the brushes on a typical Wimshurst machine would form an ' X ' on an x-ray photograph ; the charge-collection combs are typically mounted along the horizontal and equally contact the outer edges of both front and back discs.

These TGV-derived components are the traction system derived from third-generation TGV trainsets ( including the four asynchronous AC motors per power car, rectifiers, inverters, and regenerative braking technology ), the structure of the trucks / bogies ( with a long wheelbase dual transom H frame welded steel with outboard mounted tapered roller bearings ), the brake discs ( although there are only three per axle, versus four on the TGV ), and the crash energy management techniques to control structural deformations in the event of an accident.

Some programs are able to mount a disc image as a file system type, so these images appear as actual mounted discs.

The Iconbar holds icons which represent mounted disc drives and RAM discs, running applications and system utilities.

The Falcon Mk X was mounted in a 19 " 1U rack case, with external keyboard and space for internal SCSI hard discs.

Another issue was its braking and increased unsprung weight — the Alfasud's inboard front disc brakes ( mounted on the gearbox ) had been moved to the more common outboard discs ( mounted on the wheel hubs ).

Round discs made from B8 mounted in revolving stand.

The C1 model differed from the B model in the following areas: cast wheels instead of spoked ; disc brakes both front and rear with dual discs at the front having the calipers mounted behind the fork legs instead of in front like the B models ; different fork sliders to cater for the rear mounted calipers.

There's more reading and instruction to be heard on discs than ever before, although the spoken rather than the sung word is as old as Thomas Alva Edison's first experiment in recorded sound.

The discs were designed by Gaudí and Jujol between tests during their stay in Majorca, while working on the restoration of the Cathedral of Palma.

However, in certain applications where discs will not be distributed or exchanged outside a private group and will not be archived for a long time, a proprietary format may be an acceptable way to obtain greater capacity ( up to 1. 2 GB with GigaRec or 1. 8 GB with HD-BURN on 99 minute media ).

Computer files can be also stored on other media in some cases, such as magnetic tapes, compact discs, Digital Versatile Discs, Zip drives, USB flash drives, etc.

The information is printed exactly the same on both discs.

Before the Service Number was introduced in the 1990s, military personnel were identified on the I discs ( as well as other documents ) by their Social Insurance Number.

The stability rating of the discs differs depending on the manufacturer of the disc.

These ratings can be found on the discs themselves or from the manufacturer's web site.

Discraft prints the stability rating on all discs and also provides this information on their web site.

Thrown in a sidearm manner but with thumb held on the discs ' underside: its also the power finger.

Big Band Percussion ( SP-44002 ) seemed one of the least attractive discs -- the arrangements just didn't have so much character as the others.

Disk storage or disc storage is a general category of storage mechanisms, in which data are digitally recorded by various electronic, magnetic, optical, or mechanical methods on a surface layer deposited of one or more planar, round and rotating disks ( or discs ) ( also referred to as the media ).

Most of the scripts and discs were thought to have been destroyed, but all but one of the scripts were found in 1988 in the Library of Congress.

It consists of one or more rigid ( hence " hard ") rapidly rotating discs ( platters ) coated with magnetic material, and with magnetic heads arranged to write data to the surfaces and read it from them.

Some Blu-ray burning software will also allow Blu-ray discs to be produced in one or more of the above formats.

In the years following the Second World War, as component " Hi-Fi " ( high-fidelity ) and, later, " stereo " ( stereophonic ) sound systems slowly evolved from an exotic specialty item into a common feature of American homes, the literal description of the record-spinning component as a " record changer " ( which could automatically play through a stacked series of discs ) or a " turntable " ( which was usually meant to be burdened with only one disc at a time ) entered common usage.

As well, some of the other " burgers " were filled with game discs, the one for R-Type Final proudly on display right below the top bun.

There are 64 identical pieces called ' disks ' ( often spelled ' discs '), which are light on one side and dark on the other — physically with an actual set, or conceptually via computer — to correspond with the opponents in a game.

For this release, CBS and Paramount used discs without any disc art, making them look like the " Season 1 Remastered " HD DVD / DVD combo discs, despite having content only on one side.

A Criterion Collection DVD version of the film is currently available containing the complete original version of the film ( 207 minutes ) on one disc, and a second, more expansive Criterion DVD released in 2006 also contains the digitally remastered, complete film on two discs, as well as an additional disc of extra material.

Video art can take many forms: recordings that are broadcast, viewed in galleries or other venues, or distributed as video tapes or DVD discs ; sculptural installations, which may incorporate one or more television sets or video monitors, displaying ‘ live ’ or recorded images and sound ; and performances in which video representations are included.

An Oldham coupling has three discs, one coupled to the input, one coupled to the output, and a middle disc that is joined to the first two by tongue and groove.

When watching a film that exceeds 74 minutes, which is the maximum video capacity of one disc, a viewer would have to stand up and change the disc upon reaching half-way ( unless the discs are played on a VCD changer that could hold multiple discs as well as playing them automatically in succession ), whereas a single VHS can hold 3½ hours of continuous video.

For burning, version 11 shows a graphical bar indicating how much space will be used on the disc and introduced Disc spanning which splits a burn list onto multiple discs in case the content does not fit on one disc.

This was before tape existed, so the record producer needed to copy segments from the playback discs used on set, then copy and re-copy them from one disc to another adding transitions and cross-fades until the final master was created.

The Choir now records with Hyperion Records, and has released four discs to date with the label: one of the music of Mendelssohn, a collection of music for Advent, Christmas and Epiphany, Christmas at St John's, a recording of the choral and vocal music of Jongen and Peeters and most recently, a collection of the music of Bairstow.

The film was available on Blu-ray for the first time in a Special Edition Combo Pack which included two discs, one Blu-ray copy of the movie, and another DVD copy of the movie.

Through the nineties, the music grew to become one of the most popular genres in France ; in 1997, IAM's release " L ' école du Micro d ' Argent " sold more than 1 million discs, with NTM moving more than 700, 000 copies of their final album " Suprême NTM ".

There are also two different packaging editions for retail, one being in a 4-disc sized jewel case with a simple white cover and the Love Symbol in a colored circle ; the other is all four discs in a round translucent snap jewel case.

Drag ( one of the films for which Frank Lloyd was nominated but did not win in 1929 ) has long been presumed lost, though there are rumors of its survival, possibly only on videotape, and the Vitaphone discs of its soundtrack survive.

However the storage is attached, the drives themselves are usually configured as a Redundant Array of Inexpensive ( or Independent ) Discs RAID, which may be configured to provide appropriate combination of faster disk access or protection against the failure of one ( or even two ) discs in the physical RAID array.