D Web portal contains a list of the MySQL, Oracle and PostgreSQL database error codes. The code can be found with its description in many localizations and compared its existence through different versions of the database.
Database error codes
O2 Archive is the service for secured data storage with guaranteed persistence time called retention class similar to open source solutions such as OwnCloud or Dropbox. It is used to store important documents of companies (law firms, schools, medical facilities, …) that have to be backed up for some time.
QR codes is the web portal that is used to generate QR codes based on information from the completed forms or embedded definition file in JSON format. The generated QR code can be embedded on a customer website. It is also possible to generate events to calendars, business cards (vCard or MeCard), Geo location using GPS coordinates, text SMS messages, connect to the Wifi network and more.