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Huawei Online Technical Support Center for Enterprise and Carrier customers provide online services, including product manual, software downloads, troubleshooting cases, support bulletins and forums.

ORACLE-BASE - Oracle DBA and development articles, scripts, HOWTOs and forums (8i, 9i, 10g, 11g, 12c, 13c, 18c, 19c, 21c, 23ai)

The Adobe Acrobat User Community is a global resource for users of Acrobat and PDF, with free eseminars, tips, tutorials, videos and discussion forums.

Free online tutorial, interview questions and technical differences article for courses like Python, JAVA, PHP, SAP, Photoshop, Android, Hadoop, Oracle, Scala, Unix, MySQL, Lightroom, SEO and etc - STechies

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Discussion forums for IT professionals and programmers. Get free computer help and support. We cover all aspects of tech support, programming, and digital media.