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Simply put, the License Manager is a program we supply which enables
our products to run according to the terms of the license you purchased.
We sell two types of licenses - "host"-based and "user"-based. Host-based
licensing is used for uni-REXX. It enables the product to run on
a named host machine, or list of machines. User-based licensing
is used for uni-SPF and uni-XEDIT. It enables a fixed number of
concurrent users to execute the product. In each case, the relevent
licensing information is contained in a license "key" which we supply.
Host-based licensing is checked by inspection of the license key
at the start of program execution. User-based licensing requires
a permanently running program (UNIX calls this a daemon) on a central
server. This program listens on the network for user attempts to
execute our products. By keeping a list of concurrent executions,
it controls them according to the license terms.
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