Because it has no facility to output information directly. Both types of scanner (document or bar-code) work in a similar way. They use a laser beam to scan information (either from a page or a bar-code) - and turn that information into a digital format. The computer (depending on the program) converts the scanned information either into a replica of the original (document) or compares the bar-code against its database.
Neither device is designed to outpuit information directly to the user - therefore theey are both input devices only.
Scanners are considered/used as input devices because they provide input data in the form of captured images from paper documents. The scanner was invented by Raymond Kurzweil.
scanner is a input device which scans paper document into electronic or degital signal format which can be stored
As information goes from scanner IN to computer
yes
Iris scanners and fingerprint scanners are alternative (biometric) input devices for computers.
If you mean, "what devices can act as input and output?" then the answer is Touchscreens. Multifunction scanners/printers DO NOT count.
Input devices transfer data to an information system and the system processes the data. There are manual input devices and direct data entry devices that are used. Manual devices include keyboards and scanners. Direct data entry devices include smart cards and optical mark recognition.
Scanners are input devices. They take the data from text or photos and convert it to information the computer can use. Scanners are often a part of combination devices that include printers, and printers are output devices. The scanner portion sends what is on the page to the computer, and the printer portion takes what is in the computer and provides output in the form of a printed page.
Computers get information through various input devices such as keyboards and barcode scanners. Also, there are devices that can be for either input or output, such as disc drives and tape drives.
Scanners are input devices. They are taking data into a computer, like a photo or text or reading a barcode etc.
Input devices that are commonly used on computers include mice, keyboards, scanners, joysticks and trackballs. Computer hardware is made up of input, output, processor and storage.
A USB port
They are peripheral devices that attach to standalone computers (obviously monitors are built-in in laptops and tablets).They are also all input-output devices, along with mice, scanners, and card readers.Peripheral Devices.
The most appropriate input devices depend on the specific needs and context. However, commonly used input devices include keyboards and mice for general computing, touchscreen displays for mobile devices, and game controllers for gaming consoles. Other specialized input devices include scanners for digitizing physical documents and microphones for voice input. Ultimately, the appropriateness of an input device is determined by its ability to effectively and efficiently capture user input for the intended task.
They are peripheral devices that attach to standalone computers (obviously monitors are built-in in laptops and tablets).They are also all input-output devices, along with mice, scanners, and card readers.Peripheral Devices.
Input Unit-such as a mouse, keyboard, image scanners, and reading from storage devices.