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Hello Elaine, I don't have any figures to quote but having used both, the infrared mice (I don't think they use lasers) are much, much better. First of all, it has no moving parts. In a school setting you gotta' love that. Even if you have devised a cost effective method for quickly cleaning mouse innards, it still requires time and effort - most likely your time and effort. I'm sure there are better things you could be doing. Secondly, they will work on virtually any surface - without the need for a mouse pad Finally, they are almost maintenance free. Add in the fact that they are very smooth and precise to use and there is really no argument, except perhaps one - price. For brand name mice such as Microsoft or Logitech the infrared mice are usually not much more expensive then a similar mechanical mouse. What I have yet to see is a really cheap infrared mouse to compare with the no name, bargain basement mechanical mice that some schools often favour. They may be available. I just haven't found them - yet. Hope this helps. >We have spent some time developing and patenting a cheap and >easy method of cleaning mouse-ball rollers, but are finding that >several schools in our area are changing from mouseball/rollers to >lasers. > >Having spent quite a lot of money developing this cleaning system, >we would be interested to know whether this is a trend everywhere, >and also whether those who have switched to lasers find them >efficient and cost effective? > >I would be most grateful for any feedback, thanks. > >Elaine Richardson >Clifton Prep School Media Centre >Nottingham Road >South Africa > >=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-==-= >All postings to LM_NET are protected under copyright law. >To quit LM_NET (or set-reset NOMAIL or DIGEST), send email to: >listserv@listserv.syr.edu In the message write EITHER: >1) SIGNOFF LM_NET 2) SET LM_NET NOMAIL or 3) SET LM_NET DIGEST >4) SET LM_NET MAIL * Please allow for confirmation from Listserv. >For LM_NET Help see: http://ericir.syr.edu/lm_net/ >Archives: http://askeric.org/Virtual/Listserv_Archives/LM_NET.html > See also EL-Announce for announcements from library media vendors: > http://www.mindspring.com/~el-announce/ >=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-=-= -- ================================================================ John Goldsmith Fraser Valley Distance Education School 49520 Prairie Central Road, Chilliwack, B.C. Canada V2P 6H3 Voice: (604) 794-7310 Fax: (604) 795-8480 E-Mail: jgoldsmith@rainbow.fvrcs.gov.bc.ca Looking for the latest in education related web sites Look at, "Catch of the Day" http://catch.fvdes.com =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-==-= All postings to LM_NET are protected under copyright law. To quit LM_NET (or set-reset NOMAIL or DIGEST), send email to: listserv@listserv.syr.edu In the message write EITHER: 1) SIGNOFF LM_NET 2) SET LM_NET NOMAIL or 3) SET LM_NET DIGEST 4) SET LM_NET MAIL * Please allow for confirmation from Listserv. For LM_NET Help see: http://ericir.syr.edu/lm_net/ Archives: http://askeric.org/Virtual/Listserv_Archives/LM_NET.html See also EL-Announce for announcements from library media vendors: http://www.mindspring.com/~el-announce/ =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-=-=