Signs organize businesses and facilities, keep employees safe, identify hazards and restrict access to specific areas. Many different types of signs perform these functions. Accident/emergency response signs instruct employees to follow emergency protocols. Fire safety signs locate exits and fire doors, fire alarms and fire extinguishers. Parking signs identify restricted parking areas such as handicapped spaces and employee parking. Recycling, conservation and green signs locate recycling bins and help employees conserve resources. All signs use large lettering and bold, contrasting colors to increase visibility. Some signs also use universal pictograms to quickly communicate instructions or warning messages.