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  • urgent : manual hp28s

    From drnleonfamilia@gmail.com@21:1/5 to Esteba Suarez M. on Fri Oct 5 09:46:09 2018
    On Monday, April 19, 2004 at 8:07:35 AM UTC-4, Esteba Suarez M. wrote:
    I have a pdf version of the hp 28s manual. but i´m afraid it`s only
    the user manual, don`t know where you can get the reference manual.
    the file is heavy about 15mb, what is to say pretty heavy with a dial
    up connection like me. Please let me know if you are interested.
    SALUDOS DE LA ARGENTINA

    esteban suarez m.
    industrial engeneering student.

    Would you be so kind as to sen me your PDF? I may be too careful, but I can not open the battery bay. Thank you. Nicolás

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  • From Joe Horn@21:1/5 to All on Fri Oct 5 14:55:23 2018
    Would you be so kind as to sen me your PDF?
    I may be too careful, but I can not open the battery bay.
    Thank you. Nicolás

    The trick to opening the 28S battery door is to press down on it as you START to slide it off BUT THEN STOP. This lets it get past the bump inside which holds it in place. HOWEVER, as soon as it starts to move, stop pressing in,
    and only slide it very carefully. It's terribly fragile. Most 28C and 28S battery doors are now broken. If yours is still intact, take good care of it!

    You can download a B/W version of the Owner's Manual here: http://holyjoe.net/hp/HP-28S_Owner's_Manual.pdf

    You can also download a B/W version of the Reference Manual here: http://holyjoe.net/hp/HP-28S_Reference_Manual.pdf

    Hope that helps!

    -Joe-

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  • From N. Jackson@21:1/5 to Joe Horn on Fri Oct 5 18:50:15 2018
    At 14:55 -0700 on Friday 2018-10-05, Joe Horn wrote:

    You can download a B/W version of the Owner's Manual here: http://holyjoe.net/hp/HP-28S_Owner's_Manual.pdf

    You can also download a B/W version of the Reference Manual here: http://holyjoe.net/hp/HP-28S_Reference_Manual.pdf

    Thank you for these Joe. It's a long weekend here and the forecast
    is for three days of rain. Reminiscing over these manuals seems
    like a good way to spend some of it.

    The 28S was my first HP calculator and probably the reason that I
    almost failed my first year of university. (I spent night after
    night in coffee shops writing celestial navigation and geodesy
    programs on the calculator and went to my morning lectures without
    having gone to bed.) I sold the calculator later in the year to pay
    tuition and without the distraction of a calculator my grades
    improved.

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