The US Department of Labor has an online Occupational Outlook Handbook that provides career information describing hundreds of different career options, as well as what workers do on the job, working conditions, training and education needed:
http://www.bls.gov/oco/ Here's just the listing of jobs described, just under "A"
A & P mechanics see: Aircraft and avionics equipment mechanics and service technicians
ABE teachers see: Teachers—adult literacy and remedial education
Able seamen see: Water transportation occupations
Abstractors see: Medical records and health information technicians
Academic deans see: Education administrators
Account clerks see: Payroll and timekeeping clerks
Account collectors see: Bill and account collectors
Account executives see: Advertising sales agents
Account executives see: Advertising, marketing, promotions, public relations, and sales managers
Account executives, securities and investments see: Securities, commodities, and financial services sales agents
Accountants and auditors
Accounting clerks see: Bookkeeping, accounting, and auditing clerks
Accounts payable clerks see: Bookkeeping, accounting, and auditing clerks
Accounts receivable clerks see: Bookkeeping, accounting, and auditing clerks
Acoustical carpenters see: Drywall installers, ceiling tile installers, and tapers
Activity specialists see: Recreation workers
Actors, producers, and directors
Actuaries
Addictions nurses see: Registered nurses
Adjudicators see: Judges, magistrates, and other judicial workers
Adjusters see: Claims adjusters, appraisers, examiners, and investigators
Administrative assistants see: Secretaries and administrative assistants
Administrative assistants for human resources see: Human resources assistants, except payroll and timekeeping
Administrative clerks see: Office clerks, general
Administrative directors see: Administrative services managers
Administrative law judges see: Judges, magistrates, and other judicial workers
Administrative leaders see: Office and administrative support worker supervisors and managers
Administrative leads see: Secretaries and administrative assistants
Administrative managers see: Administrative services managers
Administrative managers see: Office and administrative support worker supervisors and managers
Administrative office assistants see: Administrative services managers
Administrative office assistants see: Secretaries and administrative assistants
Administrative office managers see: Office and administrative support worker supervisors and managers
Administrative office specialists see: Secretaries and administrative assistants
Administrative officers see: Administrative services managers
Administrative officers see: Office and administrative support worker supervisors and managers
Administrative professionals see: Secretaries and administrative assistants
Administrative project coordinators see: Office and administrative support worker supervisors and managers
Administrative services managers
Administrative services managers see: Office and administrative support worker supervisors and managers
Administrative specialists see: Secretaries and administrative assistants
Administrative supervisors see: Office and administrative support worker supervisors and managers
Administrative support managers see: Office and administrative support worker supervisors and managers
Administrative support specialists see: Secretaries and administrative assistants
Administrative technicians see: Office clerks, general
Administrative technicians see: Secretaries and administrative assistants
Administrative worker supervisors see: Office and administrative support worker supervisors and managers
Administrators see: Administrative services managers
Administrators see: Education administrators
Administrators see: Medical and health services managers
Administrators see: Office and administrative support worker supervisors and managers
Administrators see: Top executives
Admissions officers see: Education administrators
Admitting interviewers see: Interviewers
Adult basic education teachers see: Teachers—adult literacy and remedial education
Adult literacy teachers see: Teachers—adult literacy and remedial education
Adult secondary education teachers see: Teachers—adult literacy and remedial education
Advertising sales agents
Advertising sales agents see: Advertising, marketing, promotions, public relations, and sales managers
Advertising, marketing, promotions, public relations, and sales managers
Aerobics instructors see: Fitness workers
Aeronautical drafters see: Drafters
Aeronautical engineers see: Engineers
Aerospace engineering and operations technicians see: Engineering technicians
Aerospace engineers see: Engineers
Affirmative action coordinators see: Human resources, training, and labor relations managers and specialists
Agent-contrac