A cash register, also referred to as till, is a mechanical or electronic device for calculating and recording sales transactions, and an attached drawer for storing cash. The cash register also usually prints a receipt for the customer.
In most cases the drawer can be opened only after a sale, except when using special keys, which generally only the owner (if not also some employees) have. This reduces the risk of employees stealing from the shop owner by pocketing the money without recording a sale, when a customer does not need a receipt but has to be given change (cash is more easily checked against recorded sales than inventory). In fact, cash registers were invented for the purpose of eliminating employee theft or embezzlement; the original name was Incorruptible Cashier. It has also been suggested that odd pricing came about because by charging odd amounts like 49 or 99 cents, the cashier very probably had to open the till for the penny change and thus announce the sale.
The first cash register was invented by James Ritty and John Birch following the American Civil War. James was the owner of a saloon in Dayton, Ohio, USA, and wanted to stop employees from pilfering his profits. The Ritty Model I was invented in 1879 after seeing a tool that counted the revolutions of the propeller on a steamship. With the help of James' brother John Ritty, they patented it in 1883.
The first registers were entirely mechanical, without receipts. The employee was required to ring up every transaction on the register, and when the total key was pushed, the drawer opened and a bell would ring, alerting the manager to a sale taking place. Those original machines were nothing but simple adding machines.
Shortly after the patent, Ritty became overwhelmed with the responsibilities of running two businesses, so he sold all of his interests in the cash register business to Jacob H. Eckert of Cincinnati, a china and glassware salesman, who formed the National Manufacturing Company. In 1884 Eckert sold the company to John H. Patterson, who renamed the company the National Cash Register Company and improved the cash register by adding a paper roll to record sales transactions, thereby creating the receipt. The original purpose of the receipt was enhanced fraud protection. The business owner could read the receipts to ensure that cashiers charged customers the correct amount for each transaction and did not embezzle the cash drawer.
In 1906, while working at the National Cash Register company, inventor Charles F. Kettering designed a cash register with an electric motor.
A leading designer, builder, manufacturer, seller and exporter of cash registers in the 1950s until the 1970s was London-based (and later Brighton-based) Gross Cash Registers Ltd., founded by brothers Sam and Henry Gross. Their cash registers were particularly popular around the time of decimalisation in Britain in early 1971, Henry having designed one of the few known models of cash register which could switch currencies from £sd to £p so that retailers could easily change from one to the other on or after Decimal Day. Sweda also had decimal ready registers where the retailer used a special key on decimal day for the conversion.
In current use
Cash registers include a key labeled "NS", which is abbreviated for "No Sale", and opens the drawer, printing a receipt stating "No Sale" and recording it in the register log that the register was opened. Some other cash registers require a numeric password or physical key to be used when attempting to open the till. In some jurisdictions the law also requires customers to collect the receipt and keep it at least for a short while after leaving the shop, again to check that the shop records sales, so that it cannot evade sales taxes.
Often cash registers are attached to scales, barcode scanners, checkstands, and debit card or credit card terminals. Increasingly, dedicated cash registers are being replaced with general purpose computers with POS software. Cash registers use bitmap characters for printing.
Today, point of sale systems scan the barcode (usually EAN or UPC)) for each item, retrieve the price from a database, calculate deductions for items on sale (or, in British retail terminology, "special offer", "multibuy" or "buy one, get one free"), calculate the sales tax or VAT, calculate differential rates for preferred customers, actualize inventory, time and date stamp the transaction, record the transaction in detail including each item purchased, record the method of payment, keep totals for each product or type of product sold as well as total sales for specified periods, and do other tasks as well. These POS terminals will often also identify the cashier on the receipt, and carry additional information or offers.
Currently, many cash registers are individual computers. They may be DOS, Windows or Unix based. Many of them have touch screens. They may be connected to computerized Point of sale networks using any type of protocol. Such systems may be accessed remotely for the purpose of obtaining records or troubleshooting. Many businesses also use tablet computers as cash registers, utilizing the sale system as downloadable app-software.
A cash drawer is the compartment underneath a cash register in which the cash from transactions is kept. The drawer typically contains a removable till. The till is usually a plastic or wooden tray divided into compartments used to store each denomination of bank notes and coins separately in order to make counting easier. The removable till allows money to be removed from the sales floor to a more secure location for counting and creating bank deposits. Some modern cash drawers are individual units separate from the rest of the cash register.
A cash drawer is usually of strong construction and may be integral with the register or a separate piece that the register sits atop. It slides in and out of its lockable box and is secured by a spring-loaded catch. When a transaction that involves cash is completed, the register sends an electrical impulse to a solenoid to release the catch and open the drawer. Cash drawers that are integral to a stand-alone register often have a manual release catch underneath to open the drawer in the event of a power failure. More advanced cash drawers have eliminated the manual release in favor of a cylinder lock, requiring a key to manually open the drawer. The cylinder lock usually has several positions: locked, unlocked, online (will open if an impulse is given), and release. The release position is an intermittent position with a spring to push the cylinder back to the unlocked position. In the "locked" position, the drawer will remain latched even when an electric impulse is sent to the solenoid.
Due the increasing amount of notes and varieties of notes, many cash drawers have opted to store notes in a vertical side facing position instead of the traditional horizontal upward facing position. It enables faster access to each note and allows more varieties of notes to be stored. Sometimes the cashier will even divide the notes without any physical divider at all. Some cash drawers are also the Flip Top in design, where they flip open instead of sliding out like an ordinary drawer, resembling a cashbox instead.
Registers will typically feature a numerical pad, QWERTY or custom keyboard, touch screen interface, or a combination of these input methods for the cashier to enter products and fees by hand and access information necessary to complete the sale. For older registers as well as at restaurants and other establishments that do not sell barcoded items, the manual input may be the only method of interacting with the register. While customization was previously limited to larger chains that could afford to have physical keyboards custom-built for their needs, the customization of register inputs is now more widespread with the use of touch screens that can display a variety of point of sale software.
Modern cash registers may be connected to a handheld or stationary barcode reader so that a customer's purchases can be more rapidly scanned than would be possible by keying numbers into the register by hand. The use of scanners should also help prevent errors that result from manually entering the product's barcode or pricing. At grocers, the register's scanner may be combined with a scale for measuring product that is sold by weight.
Cashiers are often required to provide a receipt to the customer after a purchase has been made. Registers typically use thermal printers to print receipts, although older dot matrix printers are still in use at some retailers. Alternatively, retailers can forgo issuing paper receipts in some jurisdictions by instead asking the customer for an email to which their receipt can be sent. The receipts of larger retailers tend to include unique barcodes or other information identifying the transaction so that the receipt can be scanned to facilitate returns or other customer services.
In stores that use electronic article surveillance, a pad or other surface will be attached to the register that deactivates security devices embedded or attached to the items being purchased. This will prevent a customer's purchase from setting off security alarms at the store's exit.
Some corporations and supermarkets have introduced self-checkout machines, where the customer is trusted to scan the barcodes (or manually identify uncoded items like fruit), and place the items into a bagging area. The bag is weighed, and the machine halts the checkout when the weight of something in the bag does not match the weight in the inventory database. Normally, an employee is watching over several such checkouts to prevent theft or exploitation of the machines' weaknesses (for example, intentional misidentification of expensive produce or dry goods). Payment on these machines is accepted by debit card/credit card, or cash via coin slot and bank note scanner. Store employees are also needed to authorize "age-restricted" purchases, such as alcohol, solvents or knives, which can either be done remotely by the employee observing the self-checkout, or by means of a "store login" which the operator has to enter.
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