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1 application base
"The directory where the.exe file that loads into the initial or default application domain is located. If you create your own application domain, the application base is the location you specify in the AppDomainSetup class." -
2 application compatibility database
"A database that contains a list of applications that may have potential compatibility problems and remedies. When an application starts, Windows checks this database to configure system options to minimize compatibility problems."English-Arabic terms dictionary > application compatibility database