Thumbelina aka Pro Mini Input Device
Here's the full mini mouse review, roughly from newest to oldest.
At last, a nod to the tiniest mouse of the lot—Thumbelina.
Left to right: Xerox Mini Mouse | Targus Ultra Mini Retractable Optical Mouse | Mini Optical Mouse | Packard Bell & Disney Pock mini mouse | black Targus Mobile Mini Mouse | Tri-colored Child Sized Mouse | Gulliver Mouse | Thumbelina | QuickShot MiniMouse | HP Wireless Premium Mouse
This might be the tiniest mouse alive and the earliest mini as well.
It is merely 1.7 inches square. Of course, it's actually a trackball,
but that is only a mouse on its back. My diminuative pointing device
came packaged as a Pro Mini Input Device, aka Pro MiniMouse, with no
other recognizable package branding. But its own label says Thumbelina.
Thumbelina was made by Appoint, released in 1991 at $99. Later Fellowes
marketed it. When I peeled off the crude additional white label on its
back, "by Fellowes [800 phone number]" was revealed. So, this
Thumbelina was labeled after Fellowes aquired it from Appoint around
1993. Then Fellowes sold it to the unidentified business.
Like the Gulliver mouse, the Thumbelina's 3 foot long PS2 cord designed for mobile computing may not accommodate desktop computer use. The Pro Mini comes with an adhesived square of velcro to mount it but I'm not sure where you'd stick that if you compute with a laptop at various locations. Not on the desk. Maybe right on the notebook's keyboard. Alternatively, other Thumbelinas come with a 6 or 9 foot cord so you can use it from a distance for presentations.
Roll the centered pea sized ball on top to move the cursor and use the two round buttons like standard mouse buttons. The square button is for locking while dragging, signaled by a light, since you don't move the trackball like you do a mouse. Using the Velcro mount would stabilize it.
This Thumbelina came with a floppy driver for DOS and Windows, a reminder of its early beginnings 15 years ago. [Does anyone have a working driver to share?] Windows did not automatically detect and install the necessary driver in those days. It also came with an ADB connector for Macs. Some models had the NEC mini-din 9 pin connector and a combo version went either PS2 or serial.
FCC ID: IDHTH300691
Linda Rohrbough reviewed the DOS version of Thumbelina for Newsbytes September 1991. She had trouble with its drag button.
Trevor Meers' review for Mobile Computing March 1993 didn't mentioned any functional problems. He found it easy to cradle Thumbelina between the thumb and other fingers, true, but manipulating the tiny buttons is certainly not for clumsy fingers.
Last is least, in size but not in innovation of this micro mouse for micro computers.
Thumbelina was reborn as the Pro Mini, complete with a driver on floppy, apparently for Windows 95. Windows XP recognized the mouse and ran it without the driver, but it seemed sketchy. I did not try installing the driver.