The statute expressly declares that even reasonable, partial or limited restraints on the ability to do so are against public policy. Thus, agreements are void which preclude one from engaging in a particular calling for a limited period of time, Wedin v Atherholt, 298 Mich. 142; 298 N.W. 483 (1941), or which preclude one from engaging in a particular calling within a specified geographical area, E W Smith Agency, Inc v Sanger, 350 Mich. 75; 85 N.W.2d 84 (1957). MCL 445.766; MSA 28.66 provides exceptions where a sale of a business is involved, or the goodwill thereof, or where an employer furnished an employee with a route list.