Changes

(''more needed on history, developments, who are the primary sources and more.'')

(''more needed on history, developments, who are the primary sources and more.'')

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==== Centralization ====

==== Centralization, Access Control ====

In the IT world, a computer ''workgroup'' has a problem:  a known user is limited to (and trusted by) only the small few computers used to-date.  This is one of the many ''scalability'' problems in IT is being able to add new computers without having to manually set up the account for that user. Directory Services software and protocols offer a ''centralized'' set-and-forget approach to storing a users account in a central database, against which devices added to the network can directly trust/authenticate.<br />

In the IT world, a computer ''workgroup'' has a problem:  a known user is limited to (and trusted by) only the small few computers used to-date.  This is one of the many ''scalability'' problems in IT is being able to add new computers without having to manually set up the account for that user. Directory Services software and protocols offer a ''centralized'' set-and-forget approach to storing a users account in a central database, against which devices added to the network can directly trust/authenticate.<br />

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