admin orders book budget purchased
order a book
checks budget
budget exits
budget exausted
student borrow member duedate mail
borrow request
confirmation
+Book Order()
+Cataloguing()
+Book Issue()
+Recall()
-Books
library
+Issue()
+Membership()
+Recall()
-Details
operator
+Update Record()
+Delete Record()
+Create Record()
+Borrow Book()
-Memberships
admim
+Books Issue()
+Mailing()
-manage system
SYS MGR
purchased
book recieved
due date()
due date
borrow confirm
book delivered
notified
due date()
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