General line of merchandise or general merchandise is a term used in retail and wholesale business in reference to merchandise not limited to some particular category. General merchandise stores (general stores) address this sector of retail.
general line of grocery items (44511, Supermarkets and Other Grocery (except Convenience) Stores)
general line of used goods (45331, Used Merchandise Stores)
Regardless of this classification system, general stores indeed carry basic grocery items, often limited produce, basic hardware and gardening tools, and other necessaries of rural life.