- VBA for Excel, Sketchup, MySQL, React, pixlr, MS office
- Billing platform planning
- Web planning
- Van business Planning
- Esl business with Northbridge and Ateciot
- Wemade entertainment : games billing platform(~2012)
- LNK Logic korea : games billing platform(~2018)
- Consulting about Industry statistics
- Easymedia : Web planning & ON
- theMomma : billing platform, Van business, ESL business, PM
- Tetra signum : CPR Trainnig, CBS Mass portal site, PM