The IBM 4610, also known as SureMark, is a thermal point-of-sale printer, originally developed and manufactured by IBM and currently offered by Toshiba Global Commerce Solutions, launched in 1996. It is used by major retailers such as Wal-Mart (in most countries, most notably United States and Mexico), Carrefour, Costco, Cencosud, Office Depot, Tesco, Best Buy, Chedraui, King Soopers (and Kroger affiliates), London Drugs and Soriana (Mainly formerly Gigante stores). It had replaced the famous IBM Printer Model 4. With the acquisition of IBM's Retail Store Solutions (RSS) business, the SureMark printers are now produced by Toshiba Global Commerce Solutions. Toshiba started to replace 4610 family with 6145 family of receipt printers in 2018. First introduced were TCx Dual Station printers at the NRF Big Show in January 2018, then a TCx Single Station printer at LEAD 2018 show in September 2018. All 4610 models were withdrawn from sale by 2020. All printers feature a thermal printing unit for printing receipts onto thermal paper. Some models also feature an Impact printer optionally equipped with a MICR-Reader for cheque processing. The printers closely integrate into the IBM SurePOS point-of-sale systems using their 4690 Operating System, both in software (via means of an API) and hardware (certain models fit into the point-of-sale system). The printers usually feature a connector to control one or two solenoids in cash register drawers. Model overview Over the years, IBM released a set of different printers. Usually, the same model is available in two colors to match the color of the point-of-sale system they were released with, but can be operated independently. All TG-models are functionally equivalent to the TI-models with the same number and TF-models match TM-models. TG- and TF—models feature "iron gray" covers, while TI- and TM-models are "pearl white". No color distinction existed at model numbers in the second generation. Features common to all models are: 256KB flash memory, used to store custom messages, logos, code pages and journal data. Barcode generation Ability to download custom fonts and codepages Proportional and scalable fonts Upside-down printing Updatable microcode 85mm paper roll (90mm roll for models TG6 / TM6) Printers commonly use RS-232 and RS-485 interfaces, later models added a USB or Ethernet connection. Except for TF6 / TM6, the printers feature a replaceable interface card at the bottom. This card is used for both power and data and can be replaced to offer different interfaces. All