Depends on the context; most Three-Letter Acronyms have multiple meanings. However, in a help-wanted advertisement, it probably means Equal Opportunity Employer.
E?
It means: Please Turn Over at the bottom of a letter
EOE = Equal Opportunity Employer DFW = Drug Free Workplace
EOE means: Equal OppertunityEmployer
EOE/AA means Equal Opportunity Employer/Affirmative Action. It means that the employer doesn't discriminate based on race, sex, religion, age, disability, etc. - the things typically covered under Civil Rights and disability laws.
sole
The "enc." or "encl." notation at the bottom of a letter means that something is enclosed with the letter.
EOE
EOE/M/F/D/V Equal Opportunity Employer/Minorities/Female/Disabled/Veteran (employment)
errors & omissios excepted
Equal Opportunity Employer - Affirmative Action