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Computational Tree Logic
This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)

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 ?
CTL's Long-Term IDR is one notch below the common Viability Rating of Citibank N.A.
Massimo Cappello, director of Product Management for Terex Tower Cranes, said: "We are extremely excited about our new Terex CTL 272-18 tower crane, which is just the latest in a string of recent new model introductions across our hammerhead, flat top and luffing jib offerings.
The animals from the CP group spent less time in locomotion compared to the CTL group (p <0.001) at 29 days of age, and at 45 days of age the difference between the groups persisted (p <0.05).
The updated series starts with the CTL Chromebook NL7, a great unit with all the durability that customers have come to expect from CTL products.
(1) The model consists of five compartments, namely, concentration of uninfected CD4+ T cells (X), concentration of infected CD4+ T cells (Y), concentration of precursor CTL (W), concentration of effector CTL (Z), and concentration of CD8+ T lymphocytes derived from HSCs (H).
Profile specimens and corrosion test specimens were prepared separately to detect the corrosion initiation of steel and determine the CTL. The same cylindrical mortar specimens ([empty set]40 x 80 mm) containing a smooth steel rebar ([empty set]10 x 80 mm) were fabricated for corrosion measurement, without any admixed chloride.
Stuart joined the firm in 2015 as a CTL Regiori Manager and was previously with GE Capital for 10 years.
HyO rats showed a significantly lower BW at 2 months of age; this weight remained lower compared to CTL rats until the end of the experimental period (P<0.05).
Figure 2 reveals the climatological mean monthly precipitation in December for the CTL and the MOD runs based on the 15-year period from 2000 to 2014.
The company said it will leverage CTL's facilities in five countries to extend its reach to its customer base and to offer a larger portfolio of services to these customers.
(CTL) ha granted a Japan license for its cardiac regeneration medicine, Heartcel (immunomodulatory progenitor [iMP] cells) to Daiichi Sankyo.
(CTL) has granted a Japan license for its cardiac regeneration medicine, Heartcel (immunomodulatory progenitor [iMP] cells) to Daiichi Sankyo.