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Reference.org
Guard byte
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<p>A guard byte is a part of a <a href="/facts/Computer_program/e38jH9N9">computer program</a>'s <a href="/facts/Computer_memory/hQKVQ51J">memory</a> that helps software developers find <a href="/facts/Buffer_overflow/uMFduL4B">buffer overflows</a> while developing the program. </p>