I would say the term specialized points to the body of work you've done in your career as an accountant. It might help if you say where you are with your career or provide more background to the question. Are you entry level and looking to beef up your resume?
Software experience is a specialized skill of sorts. Demonstrating you worked with various enterprise software, research software, accounting software is valued. Assuming you're trying to stand out as an entry level candidate, under “Technical Skills”, include some of the various frameworks you've “specialized” in during your studies like studying COSO or GAAS. You could consider sharing school projects or memos you've written in school.
Otherwise, in my experiences, employers look for specialization in a wide range of ways through tools/experience you acquire such as what area of accounting you work in (advisory, audit – public/private/govt, or tax [SALT, international, private wealth]), again software skills (certified/skilled with SAP, Great Plains, JD Edwards, etc.), experience on specific industries (energy, real estate, software, etc.), working on unique accounting situations/projects (S-1, debt restructuring, reverse merger, risk assessment, testing controls, ERP implementation, etc.).
BEC - 85
AUD - 81
REG - 84
FAR - 7/24/16