以下是原本.pro的第二層網域，都是某些專業的縮寫，可是目前有些專業的全名都還可註，雖然對我們而言有些陌生，但不妨參考一下：
Lawyers (law.pro, bar.pro, jur.pro)
Medical Doctors (med.pro)
Certified Public Accountants (cpa.pro, aca.pro)
Engineers (eng.pro, ing.pro)
Architects (arc.pro)
Certified Financial Analysts (cfa.pro)
Certified Financial Planners (cfp.pro)
Dentists (dds.pro, den.pro)
Nutritionists (ntr.pro)
Optometrists (opt.pro)
Pharmacists (pha.pro)
Physician Assistants (pa.pro)
Podiatrists (pod.pro)
Psychologists (psy.pro)
Educators (ed.pro)
Veterinarians (vet.pro)
Physical Therapists (pt.pro)
Public Relations (pr.pro)
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