Membership is sorted into Institutional membership, and Individual membership. Institutional member is a charged member with contents service contract. Anyone could sign up individual membership with free of charge.
Membership is sorted as follows:
Institutional member is a member of institution or association with charged contents service contract, like university or research laboratory. Institutional members could use the contractual contents with PC, and other terminals within the IP bandwidth of institution.
It is a common membership that anyone could sign up with free of charge. This cannot use charged services, like the original texts.
This is a membership which is an individual member as well as individual access service member. Individual access service members could use the contractual contents with PC, and other terminals outside of the IP bandwidth of institution, like home.