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(solid-state physics)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.


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(1) (Metal Oxide Semiconductor) See MOSFET.

(2) (Mean Opinion Score) The quality of a digitized voice line. It is a subjective measurement that is derived entirely by people listening to the calls and scoring the results from 1 to 5. Toll quality audio is generally considered to have a MOS rating of 4 and above. See toll quality audio.

The MOS is an average of the numbers for a particular codec. Because MOS testing requires carefully prepared and controlled test conditions, the best way to get a MOS test done is to have it outsourced. See codec.

An Objective Model
The E-Model is another rating system that provides an objective measurement of quality based on packet loss, jitter and delay. The E-Model reports results as R-values. Following is an approximate relationship between MOS and E-Model quality ratings.

Subjective Interpretation         MOS  R

 Perfect                           5.0 100

 Excellent - almost all satisfied  4.5  90

 Very good - most are satisfied    4.0  80

 Good - some are dissatisfied      3.6  70

 Fair - many are dissatisfied      3.1  60

 Poor - most are dissatisfied      2.6  50

 Bad - not recommended             1.0   0
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References in periodicals archive ?
The above 3 MOS dietary replacement treatments are represented with 3 levels as 0, 50 and 100 g/kg of feed, respectively.
Effect of various levels of dietary MOS on feed intake is presented in Table I.
MOS 250N remained relatively stable until September 2000 when all COMSEC functions were transferred to MOS 254A, (created in 2000 though not an effected MOS until April 2003) and all CW5 positions were transferred to MOS 255Z (also created in 2000 though not an effected MOS until April 2003).
This brings us to the current state and fate of MOS 250N.
The Credentialing Opportunities On-Line (COOL) website has been updated to reflect criteria for certification programs that qualify for specified MOS promotion points.
This FDU creates force structure for this MOS through the rank of E-8.
The FCR of group D (1.0% MOS) was significantly higher compared to control and group B (0.1% MOS).
However, body weight of group C (0.5% MOS) was significantly lower compared to other MOS-supplemented groups (Table II).
W1 accession level MOS 255A (Information Services Technician) will serve as the Army's premier information systems and services technician establishing and maintaining the ability to collect, process, store, secure, search for and discover, retrieve, and disseminate information utilizing the application layer environment of the Army's portion of the cyberspace domain; they will enable Information Dissemination Management/Content Staging (IDM/CS) in order to perform the required information management/ knowledge management functions supporting combat information superiority and decision dominance.
* 233-98Y1/2/3/4 (98J) (T) 98J to 98Y transition16 weeks 2 days (Corry Station, FL), 182 MOS 98Y Soldiers still show in EDAS as needing Transition Training.
MOS 96U transitions to the Aviation Branch Proponency by FY08 and will become MOS 15W.