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System Tray

An area on the right side of the Taskbar on the Windows interface used to display the status of various functions, such as speaker volume and modem transmission. Applications also insert icons on the System Tray to give you a quick entrance into either the application itself or some auxiliary function. If you disable an application icon in the System Tray by right clicking it and selecting a Disable or Exit option, you are only eliminating it for this session. When you start up Windows again, it will reappear.

The System Tray

tray card

The printed insert that goes under the tray in a CD jewel case and wraps around both edges. If the printed cover of the jewel case is only a single piece of paper rather than a booklet, it is often known as the front tray card. See jewel case.

tray drive

A type of drive that uses a flat tray to hold the media. The tray is ejected from the drive for media placement and retracted for playing (reading). CD and CD-ROM drives are common examples of tray drives. Contrast with feed drive and caddy drive.
Copyright © 1981-2019 by The Computer Language Company Inc. All Rights reserved. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction is strictly prohibited without permission from the publisher.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



a flat vessel for processing photographic paper, film, and plates and for etching engraving plates. It has a ribbed or contoured bottom and a spout in one corner for decanting the solution. Trays may be made of glass, plastic, enameled iron, porcelain, or stainless steel in sizes that depend on the dimensions of the photographic materials being processed.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
After making the triple tray reline impression, an assistant may also need to make a bite registration.
When assisted by a knowledgeable dental assistant, a dentist performing triple tray procedures may only need to anesthetize the patient and prepare the crown and bridge abutment/s.
If the occlusion reference points are not present or are not obvious, such as if preparing a bridge where there would be no unprepared posterior tooth distal to the bridge abutments, or if a single triple tray impression will not capture all abutment teeth, then two separate impressions of the arches should be made.
After the tooth is prepared, the assistant will fill this impression tray with low--viscosity VPS and the dentist will seat this relined triple tray intra--orally to take a final impression to capture the abutment details.
Typically, equal lengths of each material are dispensed so that the total amount of impression material that will be mixed will fill the triple tray. A wide hand spatula is used to mix the two components by smearing the components together and then using the edge of the spatula to plow the impression material into a pile, followed by smearing the material again into the pad surface.
This cartridge provides enough impression material for multiple triple tray fillings.
Prior to placing the triple tray, the assistant observes the patient's natural occlusion without the triple tray in place to see how the patient's teeth mesh together in maximum inter-cuspation.
After making an anterior pre-operative triple tray impression, the assistant rinses the tray in water to remove saliva, blood and other protein material.
Mamoun and dental assistant Javaid will discuss provisional restoration fabrication in more detail, making final triple tray impressions, filling out laboratory slips and packaging cases, cementing provisional restorations, and the special topic of malting impressions for round-house crown and bridge cases.]