What is a Computer?
Discusses data processing concepts.
| What is a Computer?
Definition of the following terms: central processing unit, arithmetic, logic, input/output, peripheral devices, data, main memory, hardware, software, languages and categories of programs. |
Data in the Computer
Explains terms related to data.
| Bits and Bytes
Definition of the terms bit, byte and element/character. |
| Data Structures
Definition of the terms field, file, record and database. |
| Data Sets and Files
Definition of the following terms: fixed/variable length records, blocked/unblocked records, inter-record gap, label, sequential/random access methods, physical data set, tapemark and logical file. |
Programming Concepts
Illustrates the four major steps to follow when writing a simple program.
| Programming Concepts
Definition, analysis, design and coding of a simple BASIC program. Identification of input, logic, output and branching statements in BASIC. Definition of the following terms: field, record, file, instruction, high-level language, syntax, diagnostic message, ABEND, dump and bug. |
Submitting Your Job (JCL)
Describes what JCL is, what JCL looks like, what a job is and how JCL relates to a program.
| JCL Concepts
What JCL is and what it looks like. What a program is. How a program differs from JCL. |
| Overview of Statements
What JOB, EXEC, DD and null statements look like. How a program differs from a procedure. |
Libraries
Explains how a library works in a computer system.
| Libraries
What libraries/partitioned data sets are and their use. How an index/directory is used. What members are and how they are used. How the concatenation of data sets is used. |
Job Processing
Explains how the operating system controls job processing and supervises its own activities. Describes Job Entry Subsystem (JES) and how it works.
| Job Processing
Functions of an operating system and JES. Definition of spooling, priority and hold. Functions of an input queue, initiator and output queue. |
Data Processing Terms
Provides a glossary of data processing terms and an overview of computer languages.
| Data Processing Terms in Alphabetical Order |
| Definition of terms. |
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