Brilliant Chemistry uses three categories to help match individuals to employers. The first, Profession, groups you into a large bucket, say Registered Nurse or Software Developer. Specialization allows you to pick a particular role within that field, In-Home Health Care or Mobile Apps. And finally, Tools allow you to pick specific tools you use to work every day.
Let's look at a few examples to help illustrate what you should fill in for each of the three levels.
The first is a Kelly. She is an attorney and she deals with company formations. She has been in the business for 8 years.
Specialization: Business, Company Formation
Tools: Nothing here
While we could put in things like MS Word for Tools, that really doesn't provide a useful distinction so we'll just leave it blank.
The next is Chris. He is a developer that builds web applications. He uses Java at work, but has been doing Python in his free time. He would fill out his profile like so:
Profession: Software Developer
Specialization: Web Apps
Tools: Python, Django
Let's look at Lindsay. She is a designer and has been working for the past couple years doing design for websites. She also has a love of drawing icons and creating User Experience.
Specialization: Websites, UX, Illustration, Icons
Tools: Adobe Illustrator, OmniGraffle
In each of these examples, you'll notice that we move from less specific to most specific. If you follow this principal, you'll find it comes naturally.