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631

classification of mechanical calculating machines

Hello collectors of mechanical calculators Peter Haertel now finished "The classification of mechanical calculating machines": Part 1: Introduction Part 2:
Diestelkamp
Jan 21
#631
 
630

Please change all of your passwords for Yahoo as they have been hack

Since Yahoo see fit not to tell us these things when they happen, you need to change every one of your Yahoo passwords again and please don't use the same
group_mail_address
Jan 31, 2014
#630
 
629

Re: Royal Institution Christmas 1978 Science Lectures from Britain

That's wonderful to see pictures of it. They are all new to me.   The "brain" of the calculator is most likely a normal Sinclair calculator. The
Ant
Aug 10, 2012
#629
 
628

Re: Royal Institution Christmas 1978 Science Lectures from Britain

Tony, Thanks for the link to see the video of this incredible machine. One of these (or maybe the only one!) came up on eBay a couple of years ago and the
Nigel Tout
Aug 10, 2012
#628
 
627

Royal Institution Christmas 1978 Science Lectures from Britain

They have put up a video from Christmas 1978. If you do not know the RI lectures in Britain, they are an unashamed Christmas treat for Children and adults.
group_mail_address
Aug 10, 2012
#627
 
626

Fwd: Re: Antique Adding Machines

I'm forwarding this note I received. If interested, contact Valerie directly. ... Subject: Re: Antique Adding Machines Date: Wed, 30 Nov 2011 08:34:20 -0500
JAY RESPLER
Dec 1, 2011
#626
 
625

calcs available

I'll take any offer for Underwood (Olivetti) 582PD electronic calc. and throw in TCA DP-1200 free. -- Jay Respler ADVANCED BUSINESS MACHINES CO. 732-431-1464
JAY RESPLER
Nov 15, 2011
#625
 
624

Craig 4501 on Ebay

If anyone is interested, there's a Craig 4501 on Ebay: http://www.ebay.com/itm/140595533666?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649
immortal333
Aug 21, 2011
#624
 
623

dust cover available

Unitrex cover @ $2 includes shipping. I think it's new but dusty. I don't know what model it is for. -- Jay Respler ADVANCED BUSINESS MACHINES CO. 732-431-1464
JAY RESPLER
Aug 15, 2011
#623
 
622

Re: Arabic-Indic display calculator

On Wed, 23 Feb 2011 02:54:56 -0500, mrcalc@... ... My! Very nifty! Much appreciated. In the label that gives explanations and
Nicholas Bodley
Feb 25, 2011
#622
 
621

Arabic-Indic display calculator

I've uploaded photos to our Yahoo group of a calculator that I bought at a swap meet years ago. I have no background information on it and unfortunately it
mrcalc@...
Feb 22, 2011
#621
 
620

Re: Largest digits?

... I think that Sanyo's ICC-162 (and similar Dictaphone 1620) have a similar-sized or slightly larger digit. There were other less-capable versions (ICC-121
Rick Bensene
Feb 22, 2011
#620
 
619

Are there, or were there, any calcs. made with Hindu-Arabic displays

These are also called "Arabic-Indic" digits; they are used in countries where one finds the Arabic writing system. See the Wikipedia article "Hindu–Arabic
Nicholas Bodley
Feb 22, 2011
#619
 
618

Re: Largest digits?

... There might be, but I would not want to use what I saw. The digits were typographically condensed, which is to say that they were very narrow and tall.
Nicholas Bodley
Feb 22, 2011
#618
 
617

Largest digits?

Largest digits? Hi All! I have a calculator with very large digits (20 mm height). Iskra 211. http://www.leningrad.su/museum/show_calc.php?n=124 I have a
Sergei Frolov
Feb 22, 2011
#617
 
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