A term that refers to promotional e-mails that have been requested by the individual receiving them. Unlike spam promotional e-mails that get sent out to large lists of recipients without regard to whether or not they want the information, opt-in e-mails are only sent to people who specifically request them.
Opt-in e-mails are targeted and often personalized and carry information about specific topics or promotions that users are interested in learning about. Typical opt-in e-mails contain newsletters, product information or special promotional offers. For example, if a user frequented a Web site that sold books and music online, that user could “opt in” to receive announcements when his favorite author or musician released new material. The promotional e-mail may even present the recipient with a special promotional offer to purchase the product at a discount available only to those on the opt-in list.
Spammers, however, have found a way to use the opt-in feature to their advantage. Spam e-mails often come with opt-in features in fine print or obscured somewhere in the body of the e-mail with text that reads something to the effect of “Failure to respond to this e-mail will automatically opt-in the recipient to future mailings.” The strategy of responding to the spam and asking to be removed from future mailings also has critics as some claim that responding to a spam e-mail with a request to be removed from the mailing list signals that the e-mail address is a working address and the address can then be passed on to other spammers.
- Optical Character Recognition
Often abbreviated OCR, optical character recognition refers to the branch of computer science that involves reading text from paper and translating the images into a form that the computer can manipulate (for example, into ASCII codes). An OCR system enables you to take a book or a magazine article, feed it directly into an electronic […]
- Optical Disk
A storage medium from which data is read and to which it is written by lasers. Optical disks can store much more data — up to 6 gigabytes (6 billion bytes) — than most portable magnetic media, such as floppies. There are three basic types of optical disks: CD-ROM :Like audio CDs, CD-ROMs come with […]
- optical image stabilization
Abbreviated as OIS, optical image stabilization is the apparatus, contained within a digital camera or other digital recording device, that compensates in real-time for shaking and vibrating while recording. Because OIS is a real-time compensation there is no alterations or image degradation to the image.
- optical resolution
The physical resolution at which a device can capture an image. The term is used most frequently in reference to optical scanners and digital cameras. In contrast, the interpolated resolution indicates the resolution that the device can yield through interpolation — the process of generating intermediate values based on known values. For example, most scanners […]
- Optical Scanner
A device that can read text or illustrations printed on paper and translate the information into a form the computer can use. A scanner works by digitizing an image — dividing it into a grid of boxes and representing each box with either a zero or a one, depending on whether the box is filled […]