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HTML5, CSS3, JavaScript, jQuery, PHP, Perl, Python,
Bootstrap, Codeigniter, Angular, React, Vue, WordPress, Drupal, ASP.NET, TypeScript, NodeJS ... 

C#, C, C++, MS Visual C++, MS Visual Basic, Java, Assembler

MySQL, SQL, NoSQL, MongoDB

Windows XP / 7 / 8 / 9 / 10
Windows Server 2003 / 2008 / 2012 / 2016 / 2019

Linux / MAC OS