CKD meaning in Computing ?

Answer:

What is Count Key Data mean?

Count key data (CKD) is a direct-access storage device (DASD) data recording format introduced in 1964, by IBM with its IBM System/360 and still being emulated on IBM mainframes. It is a self-defining format with each data record represented by a Count Area that identifies the record and provides the number of bytes in an optional Key Area and an optional Data Area. This is in contrast to devices using fixed sector size or a separate format track.

Count key data (CKD) also refers to the set of channel commands (collectively Channel Command Words, CCWs) that are generated by an IBM mainframe for execution by a DASD subsystem employing the CKD recording format. The initial set of CKD CCWs, introduced in 1964, was substantially enhanced and improved into the 1990s.

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Crooked Creek (ak)	Airport Code
Certified Kitchen Designers	Business
Certificado de Capital de Desarrollo	Business
Českomoravská Kolben-Daněk	Business
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Cyclo Ketogenic Dieting	General
Complete Knock Down	General
Cone Kernal Distribution	General
Chronic Kidney Dysfunction	General
Completely Knock down	General
Ceskomoravska Kolben Danek	General
Correlated K Distribution	General
Celica Klub Danmark	General
Car Kulture Deluxe	General
Chevrolet Klubben Danmark	General
Cyclic Ketogenic Diet	General
Clough Kneizys And Davies	General
Cement Kiln Dust	Governmental
Cycling Ketogenic Diet	Governmental
CHARKHI DADRI	Indian Railway Station
Certified Kitchen Designer	Jobs
Canada Knock Down	Measurement Unit
Chronic Kidney Diseases	Medical
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Chronic Kidney Disease	Medical
Cyclic Ketogentic Dieting	Physics Related
Crooked Creek, Alaska USA	Regional
Checked	Space Science
Completely Knocked Down	Sports
Choi Kwang Do	Sports
Crooked Creek Airport	Transport & Travel