Research any topic before you write.

Find related topics. | Discover entities. | See connections. | Build a topical map.

Access method

An access method is a function of a mainframe operating system that enables access to data on disk, tape or other external devices. Access methods were present in several mainframe operating systems since the late 1950s, under a variety of names; the name access method was introduced in 1963 in the IBM OS/360 operating system. Access methods provide an…

Works, IMS & Storage access methods

Use the mouse wheel or two fingers (on touchscreens) to zoom in and out of the map.

Research this topic

Explore the main themes, entities and connections around Access method. Start with the topic map, then use the sections below for research and deeper semantic analysis.

Explore this topic

Start with a few of the strongest sections from the source topic. These are research directions, not a list of keywords you must use.

Topics to explore

Browse the full topic structure. Each item opens a new analysis centered on that subject.

Overview

Purpose of access methods

Interfaces

Storage access methods

Networking access methods

IMS

Modern implementations

Advanced semantic analysis

Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.

Map overview Semantic statistics

Access method

Nodes78
Edges77
Triples87
Avg. degree1.97
Density0.025641
Components1

How this topic connects Entity context

See the strongest relationship patterns around the current topic before diving into the raw triples.

Access method

Top relations

has method · 27
Access method → Access, Basic, BDAM, BTAM, CCWs, Channel, Distributed Data Management Architecture, EXCP, Execute Channel Program, I/O, Indexed, MVS, MVS/SP, Network-oriented, Object, OS/VSOAM, OS/VSTCP/IP, Programming, Queued, START IO
related to IMS · 26
Access method → Generalized Sequential Access Method, GSAM, HDAM, HIDAM, Hierarchical Direct Access Method, Hierarchical Indexed Direct Access, Hierarchical Indexed Sequential Access, Hierarchical Sequential Access Method, HISAM, HSAM, IMS, Method, OSAM, Overflow, Partitioned Hierarchical Direct Access, Partitioned Hierarchical Indexed Direct, Partitioned Secondary Index, PHDAM, PHIDAM, PSIMDEX
related to Interfaces · 26
Access method → ACB, Access Control Block, CHECK, CLOSE, Data Control Block, Data Event Control Block, DCB, DECB, EXCP, For Execute Channel Program, IBM, In OS/360, In OS/VS, Input/Output Block, IOB, Many, OPEN, READ, Request Parameter List, RPL
related to Basic versus queued · 3
Access method → Basic, Both, Queued
related to Modern implementations · 3
Access method → Data Facility ProductCommunications Server, In, OS
is a · 2
Access method → function of a mainframe operating system that enables access to data on disk, trusted program

Important terminology Word statistics

Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.

Important terminology

access methods data system program method operating basic os queued programs storage sequential direct control block provide systems records channel

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Access methodis afunction of a mainframe operating system that enables access to data on disk0.90text
Access methodis atrusted program0.90text
Access methodhas methodSystem/3600.60section
Access methodhas methodI/O0.60section
Access methodhas methodChannel0.60section
Access methodhas methodCCWs0.60section
Access methodhas methodProgramming0.60section
Access methodhas methodSTART IO0.60section
Access methodhas methodThis0.60section
Access methodhas methodExecute Channel Program0.60section
Access methodhas methodEXCP0.60section
Access methodhas methodSVC0.60section

Related concept clusters Concept neighborhoods

These clusters group vocabulary that occurs around closely connected concepts in the source material.

    Connections between topic areas Semantic bridges

    Bridges can reveal useful research angles that are easy to miss in a flat list of related terms.

    Min side: 3
    For writers, content strategists, SEOs, marketers and creators — from quick topic research to advanced semantic analysis.