Identify the letter of the choice that best matches the phrase or definition.

A. A working model of the proposed system's essential functionality
B. Verifies that each individual program or object works by itself
C. Whether designed for a small or large computer, most DBMSs perform common ones.
D. Verifies that an application works with other applications
E. Performed by end users and checks the new system to ensure that it workswith actual data
F. The smallest unit of data a user accesses
G. The collection and summarization of data, information, and deliverables
H. What each byte represents in ASCII
I. A group of related fields
J. A field that uniquely identifies each record in a file
K. Has special keywords and  rules that users include in statements
L. A measure of how suitable the development of a system will be to the organization
M. This database capability is one of the more powerful database features.
N. Kind of rules that decrease data entry errors, and thus enhance the data's integrity
O. While a user is working with the database, this resides in the memory of the computer.

A. proof of concept
B. unit test
C. systems test
D. integration test
E. acceptance test
F. field
G. documentation
H. character
I. record
J. primary key
K. SQL
L. feasibility
M. querying
N. validation
O. DBMS