"Internet Practical Skills Certification Level 2 Official Textbook" This is the only official textbook for the "Internet Practical Skills Certification Exam (i-ken) Level 2" conducted by the NPO Internet Practical Skills Certification Association. With the full cooperation of the Internet Practical Skills Certification Association, the organization that administers the exam, this revised edition of the textbook has been edited by the certification committee, in line with the current course textbook revisions. If anyone is using this, thank you in advance. Please note that there are some areas with writing in them. (^^)