How to Join LinkedIn with an Invitation
Enter your Job Title, and the name of the Company where you are currently employed in the boxes provided. (This includes any self-employed folks out there.)
Depending on your employment status, LinkedIn may reload the page with a new field, Industry. Use the drop-down list to identify which industry you feel you belong to. If you're not employed at the moment, LinkedIn will ask you for your most recent job title and company.