用戶可以選擇以個人用戶或機構用戶的身份訂閱本資料庫﹕
Individual and Institutional subscription available:
個人用戶將以登錄名稱及密碼進入本資料庫，同一名稱同時只能登入一次。
Individual subscribers will
access the Database using Login Names and Passwords. Only one session is allowed
concurrently using the same Login Name.
機構用戶將以IP
位址或IP 區段進入本資料庫(例如61.40.39.1 - 61.40.39.254)，每機構最多能夠提供四個IP
區段，所有在該IP 區段內的電腦能同時進入本資料庫。
Institutional subscribers will
access the Database using IP addresses or IP Domains (for example, 61.40.39.1
- 61.40.39.254). Each institution can provide up to 4 IP Domains and all computers
within those domains can access the Database concurrently.
試用用戶將以登錄名稱及密碼進入本資料庫，同一名稱同時只能登入一次。
Trial subscribers will access the Database using Login Names and Passwords. Only one session is allowed concurrently using the same Login Name.
