Control key

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control key

[kən′trōl ‚kē]
(computer science)
A special key on a computer keyboard which, when depressed together with another key, generates a different signal than would be produced by the second key alone.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

Control key

Abbreviated "Ctrl" or "Ctl." A modifier key that is pressed with a letter or digit key to command the computer. The caret symbol is a common symbol for Control; for example, ^Y means Ctrl-Y.

In most Windows applications, holding down Control and pressing the left or right Arrow key moves the cursor to the previous or next word. Likewise, Ctrl-B, Ctrl-I and Ctrl-U turn bold, italic and underline on and off. The Mac uses two modifier keys; for example, Option/Arrow moves the cursor, while Command-B, I and U toggle bold, italic and underline. Control is used to edit Mac and Unix command lines; for example, Ctrl-L clears the screen. See Command key.

Control vs. Caps Lock
On the original IBM PC in 1981, the Control key was placed left of the A key. In 1985, IBM swapped the location of the frequently used Control key with the rarely used Caps Lock key, making keyboarding more cumbersome, especially for touch typists. Like sheep, all keyboard manufacturers followed suit. Fortunately, the Control key can be restored to its former location using Registry hacks, custom keyboard control panels or programmable keyboards. See Alt key and PC keyboard.

Swap the Keys
This Microsoft keyboard control panel restores the Control key to its original location. This is an easy way to make the switch.

Updated Key Caps
This programmable keyboard came with a "puller" to pop off the old Control and Caps Lock key caps and exchange them for new ones. Most keyboards do not come with this bonus. See Avant Stellar keyboard.

Even the Mac
Mac keyboards use the same Caps Lock location as PC keyboards, but the OS X control panel allows the modifier keys to be easily changed by the user.
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References in periodicals archive ?
After an overview of the biases in the left column, we can see that biases are clustered into two groups, including CNTL and RADAWS with larger biases, as well as RADSND and ALLDATA with lower bias errors.
It can be seen that RADSND and ALLDATA exhibit lower biases than CNTL and RADAWS (Figures 14(a) and 14(b)), which is consistent with precipitation distribution as shown before.
To compare the impact of surface AWS and radiosonde data with that of radar data more clearly, Figure 15 shows the bias score and ETS for 12 h accumulated precipitation from experiments CNTL and ALLDATA, as well as forecasts without any data assimilation (short for NOASSIM) for both cases.
In contrast, the bias scores of CNTL are too large, all over the perfect value of 1.
Experiments Description CNTL Radar data assimilation at start time in 4 km domain RADAWS CNTL + AWS data assimilation at start time in 4km domain RADSND CNTL + radiosonde data assimilation at start time in 4 km domain ALLDATA CNTL + AWS and radiosonde data assimilation at start time in 4 km domain
Since changing the observing system constitutes a change to the NWP system, we are motivated to apply the skill distribution analysis described in appendix B to the CNTL, NOPM, and OPS runs.
The OPS and CNTL skill distributions are very similar (Fig.
To quantify the abovementioned results, we divide the CNTL score distribution into quintiles, each with 20% of the total number of forecast scores (Table 5).
7) are calculated by determining the percentages of NOPM and OPS forecasts in each of the CNTL quintiles defined in Table 5.
The control (CNTL) ingested observations from the operational GOS, including those from a polar-orbiting MW (temperature and moisture) sounder and a hyperspectral IR sounder in both the mid-AM and PM orbits.