A.analysis
B.design
C.installation
D.upgrade

A.E-mail
B.E-commerce
C.E-Iearning
D.E-communication

A.computer-oriented
B.procedure-oriented
C.object-oriented
D.aspect-oriented

A.management
B.storage
C.analysis
D.communication

A.queue
B.stack
C.tree
D.linearlist