In general, ergonomic keyboards are designed to keep the user's arms and wrists in a near-neutral position, which means the slant angle (the lateral rotation angle for the keys in each half relative to the axis of the home row in a conventional keyboard) is approximately 10 to 12.5°, the slope (the angle of the keytop surfaces starting from the front edge closer to the user towards the top of the keyboard, relative to a horizontal plane) is -7.5°, and the tent or gable angle of each half (the angle of the keytops from the center of the keyboard towards its left and right edges, relative to the horizontal desk surface) is 20 to 30°. ;Notes
Natural Keyboard The first generation of the Microsoft ergonomic keyboards, named the
Natural Keyboard, was released in September 1994, designed for Microsoft Windows 95 and Novell Netware. It was designed for Microsoft by Ziba Design with assistance and manufacturing by
Key Tronic. The Microswitch division of
Honeywell, which was responsible for that company's keyboards and was acquired by Key Tronic in early 1994, is also credited with design input. The
keyboard uses a fixed-split design, with each half of the alphanumeric section separated, laterally rotated, and tilted upwards and down from the center of the keyboard. This key arrangement was
ergonomically designed to prevent
carpal tunnel syndrome and other
repetitive strain injuries associated with typing for long periods of time. Another innovation was the integrated wrist pad helping to ensure correct posture while sitting at the computer and further reducing strain on the neck, arms and wrists. This keyboard also introduced three new keys purposed for Microsoft's
upcoming operating system: two
Windows logo keys () between the and keys on each side, and a key between the right Windows and Ctrl keys. The three Num Lock/Caps Lock/Scroll Lock status lights are arranged vertically between the two halves of the alphanumeric section. Although it was not the first ergonomic keyboard, it was the first widely available sub-$100 offering. and the Natural Keyboard sold over 600,000 per month at its peak. Like the original Natural Keyboard, the Elite was manufactured by Key Tronic, who also assisted in its development. The Natural Keyboard Pro restored the standard inverted-T layout of the cursor keys and six-key nav/edit cluster 2×3 layout, and added a row of program shortcut keys along the top edge of the keyboard (above — and the numeric keypad), including multimedia keys and
power management keys. Vista and
Windows 7 have the ability to customize shortcut key behavior without additional software when using the "internet keyboard" keyboard layout. Some other modern operating systems, such as
FreeBSD and most
Linux distributions, have comparable configuration options. The Natural Keyboard Pro also included an internal two-port
USB hub, which was commonly used to connect other input devices such as a mouse or trackball, but this was dropped in subsequent iterations.
Natural Multimedia Keyboard In September 2002, Microsoft introduced the redesigned
Natural Multimedia Keyboard (sometimes styled as
MultiMedia) at a retail price of . The Natural Multimedia Keyboard reworked the row of multimedia buttons and included the controversial
F Lock feature, originally debuted in the
Microsoft Office Keyboard in 2001. Another common criticism is that although the bunched arrow keys of previous generation has been fixed by returning to the standard inverted T layout, the six-key nav/edit cluster has been changed to a 2x3 vertical layout, with moved to the F-Lock function of , and key expanded to double height. On the Natural Multimedia Keyboard, the status indicator lights for
Num lock,
Scroll lock, and
Caps lock were moved from between the banks of alphanumeric keys to a more traditional location above and to the right of the backspace key. The Natural Multimedia Keyboard was manufactured in at least three different color schemes, including white with blue accents, black with silver accents, and white with black accents.
Wireless Optical Desktop Pro The
Wireless Optical Desktop Pro was introduced alongside the Natural MultiMedia Keyboard in September 2002 at a retail price of , This keyboard provides a significantly changed ergonomic design, including an integrated leatherette
wrist rest, noticeably concave key banks, and a removable front stand to generate negative slope, which helps to straighten the wrist and allows the fingers to drop naturally onto the keys. The multimedia keys have again been redesigned, and the six-key nav/edit cluster has been fixed by returning to the standard 3×2 horizontal rectangular layout. The F Lock key now defaults to "on", providing the original function key features rather than the new "enhanced" functions, and retains its setting across reboots. The 4000 has the indicator lights for Caps lock, etc. moved back to between the banks of keys, although they are now below the space bar, rather than above. The 4000 is also significantly quieter to type on, with less of the distinctive "click clack" noise that is common with older keyboards; as it is likely uses cheaper membrane key switches (as opposed to mechanical), which tend to be quieter but have twice as much travel before depression. The space bar, however, has been reported by several reviewers to be unusually noisy and difficult to depress. The 4000 is available in two variants, Business and Retail. The exact differences are not known, although product descriptions imply that the packaging is different, and prices are often slightly higher for the Business edition.
Natural Ergonomic 7000 keyboard In June 2007, Microsoft introduced the
Natural Wireless Ergonomic Keyboard 7000 as part of the Natural Ergonomic Desktop 7000 bundle, which includes the Natural Wireless Laser Mouse 7000 at a retail price of . The biggest difference between the 7000 and 4000 keyboards, aside from wireless functionality, is the position of the status lights (Num Lock, Caps Lock, Scroll Lock, and F Lock). On the Natural Ergonomic 4000, these lights are on the
wrist rest, centered vertically under the spacebar. In their place, on the Natural Ergonomic 7000 keyboard, resides a single battery indicator light. The Microsoft Natural Ergonomic Desktop 7000 comes with a USB wireless dongle that connects both the mouse and the keyboard. The attachment to elevate the front of the keyboard is separate in the box. The Natural Ergonomic Desktop 7000 bundle also comes with batteries, a very brief user guide, a disk containing the Microsoft Intellitype and Intellipoint software, and the Natural Wireless Laser Mouse 7000, which uses the same physical design as the Natural Wireless Laser Mouse 6000 with a different radio frequency.
Sculpt ergonomic keyboard Microsoft introduced the
Sculpt Ergonomic keyboard in August 2013 as part of the Sculpt Ergonomic Desktop bundle with the Sculpt Ergonomic mouse at a retail price of . The keyboard was made available separately in "Business" packaging for . The wireless keyboard uses a
scissor-switch mechanism and features a detached number pad. The arrangement of the six-key nav/edit cluster is nonstandard, although the arrow keys are still laid out as an inverted-T. Microsoft state the proprietary wireless connection eliminates any delay in waking the computer. Rather than using feet to elevate the back of the keyboard, the Sculpt Ergonomic keyboard comes with a reverse-tilt riser that snaps on to the bottom front edge of the keyboard using magnets. During development, the Sculpt keyboard was codenamed "Manta Ray" for its resemblance to the animal. The shape of the Surface Ergonomic keyboard is similar to the Sculpt, but the six-key navigation block returns to the standard two-row, three-column arrangement, and the number pad is integrated into right side of the Surface Ergonomic. The Surface is gray and the wrist pad is covered with
Alcantara instead of the gloss black finish and vinyl wrist pad of the Sculpt. The Surface has also dropped the option to add the magnetic front riser for negative slope. In addition, the Surface Ergonomic is connected wirelessly over
Bluetooth instead of using a proprietary dongle. One reviewer noted the typing action of the Surface scissor switches was "more satisfying with improved quality" than the Sculpt.
Microsoft Ergonomic Keyboard The
Microsoft Ergonomic keyboard was introduced in 2019 and is the successor to the
4000 keyboard. Like the 4000, it is black, wired, contains three sections (from left to right, alphanumeric, navigation, and numeric keypad), and is not backlit. It loses the zoom toggle, the back/forward button under the spacebar, and the space under the function keys are gone. There is a retail version (LXM-00013) and a business version (LXN-0004) and their differences (aside from the $10 markup on the business version) are currently unknown, though there might only be a UK layout for the business version. == See also ==