Produced by its own staff

• Like some corporate publications
• Using the staff's work
• Staff-produced
• Using company resources
• Employed around head office, not contracted out
• One with common sense bottling hydrogen - to begin with engineer's not outsourced
• Originating within a company
• Not freelance
• Not utilizing outside help

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
also in-house , 1955, from in + house .