In this guide we distinguish between the four basic forms of continuing education:

• Classroom instruction (without the support of computers)
• Blended learning (classroom instruction + computer-supported online learning)
• eLearning (WBT or CBT without classroom activities)
• Learning on demand, which stands for demand-oriented usage of learning units, lexicons and other aids to be used whenever problems occur and need to be solved quickly during operational processes.
  

The last three forms of learning may be supported by an online learning community or online tutors and instructors.