I have a strong memory of torches with the same form factor as a creditstill seem to be available ...
card, so they would fit in a wallet.
I've had a quick look but can't find any on line so far.
Does anyone else remember these?
I have a strong memory of torches with the same form factor as a credit
card, so they would fit in a wallet.
I've had a quick look but can't find any on line so far.
Does anyone else remember these?
https://www.casio-calculator.com/Museum/Pages/SSS/SL-800%20WE/Casio%20SL- >800%20WE.html
On 20:11 4 Jan 2025, Chris Hogg said:
On Sat, 04 Jan 2025 19:34:18 GMT, Pamela
<[email protected]> wrote:
https://www.casio-calculator.com/Museum/Pages/SSS/SL-800%20WE/ >>Casio%20SL-800%20WE.html
I still have something very similar, except it's a Systema EX4. The
layout is slightly different to this one which is a Systema EX2 and
appears only to have 2 solar cells, whereas the EX 4 has four cells.
Still works, given a reasonable light source.
https://www.retro-sect.co.uk/product/systema-ex-2-solar-slim- card-calculator/
The Casio really was thin at 0.8mm, whereas a credit card is 0.76mm
thick. I suppose it was a demonstration of what they could mass produce.
As far as I remember, Casio's later credit-card models were two or three times as thick, like many of the competition.
Now I'm becoming nostalgic ... after having had three slide rules, I
bought this as my first calculator.
On Sat, 04 Jan 2025 22:33:51 GMT, Pamelatimes as thick, like many of the competition.
Now I'm becoming nostalgic ... after having had three slide rules,
Ah, the slide rule - I doubt if kids of today even know what that is
let alone how to use one.
On 20:11 4 Jan 2025, Chris Hogg said:
On Sat, 04 Jan 2025 19:34:18 GMT, Pamela
<[email protected]> wrote:
https://www.casio-calculator.com/Museum/Pages/SSS/SL-800%20WE/ >>>Casio%20SL-800%20WE.html
I still have something very similar, except it's a Systema EX4. The
layout is slightly different to this one which is a Systema EX2 and
appears only to have 2 solar cells, whereas the EX 4 has four cells.
Still works, given a reasonable light source.
https://www.retro-sect.co.uk/product/systema-ex-2-solar-slim-
card-calculator/
The Casio really was thin at 0.8mm, whereas a credit card is 0.76mm
thick. I suppose it was a demonstration of what they could mass produce.
As far as I remember, Casio's later credit-card models were two or three >times as thick, like many of the competition.
Now I'm becoming nostalgic ... after having had three slide rules,
In article <[email protected]>,
Pamela <[email protected]> wrote:
On 20:11 4 Jan 2025, Chris Hogg said:
On Sat, 04 Jan 2025 19:34:18 GMT, Pamela
<[email protected]> wrote:
https://www.casio-calculator.com/Museum/Pages/SSS/SL-800%20WE/
Casio%20SL-800%20WE.html
I still have something very similar, except it's a Systema EX4. The
layout is slightly different to this one which is a Systema EX2 and
appears only to have 2 solar cells, whereas the EX 4 has four cells.
Still works, given a reasonable light source.
https://www.retro-sect.co.uk/product/systema-ex-2-solar-slim-
card-calculator/
The Casio really was thin at 0.8mm, whereas a credit card is 0.76mm
thick. I suppose it was a demonstration of what they could mass
produce.
As far as I remember, Casio's later credit-card models were two or
three times as thick, like many of the competition.
Now I'm becoming nostalgic ... after having had three slide rules, I
bought this as my first calculator.
I've still got my university slide rule bought in 1959! I've also got my grandfather's slide rule, but its a bit stiff to operate being of wooden constructon.
On Sun, 05 Jan 2025 10:00:03 +0000, charles wrote:
In article <[email protected]>,
Pamela <[email protected]> wrote:
On 20:11 4 Jan 2025, Chris Hogg said:
On Sat, 04 Jan 2025 19:34:18 GMT, Pamela
<[email protected]> wrote:
https://www.casio-calculator.com/Museum/Pages/SSS/SL-800%20WE/
Casio%20SL-800%20WE.html
I still have something very similar, except it's a Systema EX4. The
layout is slightly different to this one which is a Systema EX2 and
appears only to have 2 solar cells, whereas the EX 4 has four cells.
Still works, given a reasonable light source.
https://www.retro-sect.co.uk/product/systema-ex-2-solar-slim-
card-calculator/
The Casio really was thin at 0.8mm, whereas a credit card is 0.76mm
thick. I suppose it was a demonstration of what they could mass
produce.
As far as I remember, Casio's later credit-card models were two or
three times as thick, like many of the competition.
Now I'm becoming nostalgic ... after having had three slide rules, I
bought this as my first calculator.
I've still got my university slide rule bought in 1959! I've also got my
grandfather's slide rule, but its a bit stiff to operate being of wooden
constructon.
I never got my head around how to operate a slide rule.
Seemed to be a maths geek thing.
Cheers
Dave R
On Sun, 05 Jan 2025 10:00:03 +0000, charles wrote:
In article <[email protected]>,
Pamela <[email protected]> wrote:
On 20:11 4 Jan 2025, Chris Hogg said:
On Sat, 04 Jan 2025 19:34:18 GMT, Pamela
<[email protected]> wrote:
https://www.casio-calculator.com/Museum/Pages/SSS/SL-800%20WE/
Casio%20SL-800%20WE.html
I still have something very similar, except it's a Systema EX4. The
layout is slightly different to this one which is a Systema EX2 and
appears only to have 2 solar cells, whereas the EX 4 has four cells.
Still works, given a reasonable light source.
https://www.retro-sect.co.uk/product/systema-ex-2-solar-slim-
card-calculator/
The Casio really was thin at 0.8mm, whereas a credit card is 0.76mm
thick. I suppose it was a demonstration of what they could mass
produce.
As far as I remember, Casio's later credit-card models were two or
three times as thick, like many of the competition.
Now I'm becoming nostalgic ... after having had three slide rules, I
bought this as my first calculator.
I've still got my university slide rule bought in 1959! I've also got my
grandfather's slide rule, but its a bit stiff to operate being of wooden
constructon.
I never got my head around how to operate a slide rule.
On Sun, 05 Jan 2025 10:00:03 +0000, charles wrote:
In article <[email protected]>,
Pamela <[email protected]> wrote:
On 20:11 4 Jan 2025, Chris Hogg said:
On Sat, 04 Jan 2025 19:34:18 GMT, Pamela
<[email protected]> wrote:
https://www.casio-calculator.com/Museum/Pages/SSS/SL-800%20WE/
Casio%20SL-800%20WE.html
I still have something very similar, except it's a Systema EX4. The
layout is slightly different to this one which is a Systema EX2 and
appears only to have 2 solar cells, whereas the EX 4 has four cells.
Still works, given a reasonable light source.
https://www.retro-sect.co.uk/product/systema-ex-2-solar-slim-
card-calculator/
The Casio really was thin at 0.8mm, whereas a credit card is 0.76mm
thick. I suppose it was a demonstration of what they could mass
produce.
As far as I remember, Casio's later credit-card models were two or
three times as thick, like many of the competition.
Now I'm becoming nostalgic ... after having had three slide rules, I
bought this as my first calculator.
I've still got my university slide rule bought in 1959! I've also got my
grandfather's slide rule, but its a bit stiff to operate being of wooden
constructon.
I never got my head around how to operate a slide rule.
Seemed to be a maths geek thing.
Cheers
Dave R
On Sun, 1/5/2025 11:25 AM, David wrote:
On Sun, 05 Jan 2025 10:00:03 +0000, charles wrote:
In article <[email protected]>,
Pamela <[email protected]> wrote:
On 20:11 4 Jan 2025, Chris Hogg said:
On Sat, 04 Jan 2025 19:34:18 GMT, Pamela
<[email protected]> wrote:
https://www.casio-calculator.com/Museum/Pages/SSS/SL-800%20WE/
Casio%20SL-800%20WE.html
I still have something very similar, except it's a Systema EX4. The
layout is slightly different to this one which is a Systema EX2 and
appears only to have 2 solar cells, whereas the EX 4 has four cells. >>>>> Still works, given a reasonable light source.
https://www.retro-sect.co.uk/product/systema-ex-2-solar-slim-
card-calculator/
The Casio really was thin at 0.8mm, whereas a credit card is 0.76mm
thick. I suppose it was a demonstration of what they could mass
produce.
As far as I remember, Casio's later credit-card models were two or
three times as thick, like many of the competition.
Now I'm becoming nostalgic ... after having had three slide rules, I
bought this as my first calculator.
I've still got my university slide rule bought in 1959! I've also got my >>> grandfather's slide rule, but its a bit stiff to operate being of wooden >>> constructon.
I never got my head around how to operate a slide rule.
Seemed to be a maths geek thing.
Cheers
Dave R
You would enjoy the round slide rule then.
https://www.ebay.ca/itm/255963555516
The person who owned one of those, claimed they
could do some maths as fast on that, as on a
push button calculator.
It's a bit like Rubiks Cube I suppose, the people
who practice at it, are crazy fast.
My slide rule was made from bamboo and the bamboo
seems to be suspended in some sort of other material.
I couldn't make sense of the grain structure.
The bamboo makes it slide, and the material is inert
enough to avoid distortions of the material over time.
It can get a bit sticky at times (the slide action).
It's somewhere in the house, but I can't remember exactly where.
https://www.sphere.bc.ca/oldsite/test/ho/scans/h-o_1773_f.jpg
It's only intended for carrying a few digits of accuracy,
but for the people who still use things like that, it's
sufficient for shop work.
The good slide rules, were not department store items.
You could buy all-plastic slide rules in the department
store, but those aren't worth owning (they could warp
if you were careless). The bamboo ones are a bit nicer.
The face was finished in white celluloid.
They came with a leather carry case, and the leather carry
case could be fitted to your pants, as a kind of "ornamental
sword". But the novelty of wearing it that way wore off
quickly. And as programmable calculators had just come out,
the slide rule disappeared entirely. The programmable calculators
also had a loop for your pants :-) Always know your
customer. Rule of thumb -- if you own something, fasten
it to your pants.
Paul
Of my collection, the ones that have fared best are the plastic ones,
Faber Castell and the like. Wood is hopeless, they have all warped more
or less. The one metal one is OK, a Pickett, but not the nicest action.
The super accurate ones (I have Otis King, Fuller and Fowler) have all suffered with age. The surprising thing about the Fuller, which has a
huge spiral scale, is that it is not as accurate as it should be, the
scale is not as well divided as it could be.
nib
Slide rules are one of those items once cherished but made obsolete en
masse fairly quickly and since have laid unused and forgotten in loads of drawers,desks and lofts.
The generation that used them for real and invested in a well engineered quality version are dying fast and a lot of these fine items can be found almost for peanuts in antique shops,boot sales etc .
Apart from looking a nice decorative item there isn’t much you can do with them.
Marland wrote:
Slide rules are one of those items once cherished but made obsolete en
masse fairly quickly and since have laid unused and forgotten in
loads of
drawers,desks and lofts.
The generation that used them for real and invested in a well engineered
quality version are dying fast and a lot of these fine items can be found
almost for peanuts in antique shops,boot sales etc .
Apart from looking a nice decorative item there isn’t much you can do
with
them.
I never had a slide rule of my own, we did use log tables at school, and
made Napier's bones, then calculators landed. I've inherited Dad's
slide rule in its battered case, I could do a multiplication with it if
I had to ... then boggle at the other scales.
nib wrote:
Andy Burns wrote:
I never had a slide rule of my own, we did use log tables at
school, and made Napier's bones, then calculators landed. I've
inherited Dad's slide rule in its battered case, I could do a
multiplication with it if I had to ... then boggle at the other
scales.
Such as these: http://caffnib.co.uk/slides.htm !!!
Ahhh, I always wondered what Crossfield Electronics in Peterborough
actually did, they were generous enough to let a rag-tag bunch of us
use a room for a "computer club" in the early 80s
Andy Burns wrote:
I never had a slide rule of my own, we did use log tables at school,
and made Napier's bones, then calculators landed. I've inherited
Dad's slide rule in its battered case, I could do a multiplication
with it if I had to ... then boggle at the other scales.
Such as these: http://caffnib.co.uk/slides.htm !!!
On Sun, 05 Jan 2025 10:00:03 +0000, charles wrote:
In article <[email protected]>,
Pamela <[email protected]> wrote:
On 20:11 4 Jan 2025, Chris Hogg said:
On Sat, 04 Jan 2025 19:34:18 GMT, Pamela
<[email protected]> wrote:
https://www.casio-calculator.com/Museum/Pages/SSS/SL-800%20WE/
Casio%20SL-800%20WE.html
I still have something very similar, except it's a Systema EX4. The
layout is slightly different to this one which is a Systema EX2 and
appears only to have 2 solar cells, whereas the EX 4 has four cells.
Still works, given a reasonable light source.
https://www.retro-sect.co.uk/product/systema-ex-2-solar-slim-
card-calculator/
The Casio really was thin at 0.8mm, whereas a credit card is 0.76mm
thick. I suppose it was a demonstration of what they could mass
produce.
As far as I remember, Casio's later credit-card models were two or
three times as thick, like many of the competition.
Now I'm becoming nostalgic ... after having had three slide rules, I
bought this as my first calculator.
I've still got my university slide rule bought in 1959! I've also got my
grandfather's slide rule, but its a bit stiff to operate being of wooden
constructon.
I never got my head around how to operate a slide rule.
On 5 Jan 2025 at 16:25:03 GMT, "David" <[email protected]> wrote:
On Sun, 05 Jan 2025 10:00:03 +0000, charles wrote:
In article <[email protected]>,
Pamela <[email protected]> wrote:
On 20:11 4 Jan 2025, Chris Hogg said:
On Sat, 04 Jan 2025 19:34:18 GMT, Pamela
<[email protected]> wrote:
https://www.casio-calculator.com/Museum/Pages/SSS/SL-800%20WE/
Casio%20SL-800%20WE.html
I still have something very similar, except it's a Systema EX4. The
layout is slightly different to this one which is a Systema EX2 and
appears only to have 2 solar cells, whereas the EX 4 has four cells. >>>>> Still works, given a reasonable light source.
https://www.retro-sect.co.uk/product/systema-ex-2-solar-slim-
card-calculator/
The Casio really was thin at 0.8mm, whereas a credit card is 0.76mm
thick. I suppose it was a demonstration of what they could mass
produce.
As far as I remember, Casio's later credit-card models were two or
three times as thick, like many of the competition.
Now I'm becoming nostalgic ... after having had three slide rules, I
bought this as my first calculator.
I've still got my university slide rule bought in 1959! I've also got my >>> grandfather's slide rule, but its a bit stiff to operate being of wooden >>> constructon.
I never got my head around how to operate a slide rule.
Don't be silly, any six or seven year old who has been taught sums at school could learn to use it for multiplication in five minutes.
On 17:11 4 Jan 2025, David said:
I have a strong memory of torches with the same form factor as a credit
card, so they would fit in a wallet.
I've had a quick look but can't find any on line so far.
Does anyone else remember these?
Cheers
Dave R
Thinking of which, back in the 1980s I had a Casio credit-card calculator less than 1mm thick, called the SL-800.
It was fiddly but worked quite well.
https://www.casio-calculator.com/Museum/Pages/SSS/SL-800%20WE/Casio%20SL- 800%20WE.html
Marland wrote:
Slide rules are one of those items once cherished but made obsolete en
masse fairly quickly and since have laid unused and forgotten in
loads of
drawers,desks and lofts.
The generation that used them for real and invested in a well engineered
quality version are dying fast and a lot of these fine items can be found
almost for peanuts in antique shops,boot sales etc .
Apart from looking a nice decorative item there isn’t much you can do
with
them.
I never had a slide rule of my own, we did use log tables at school, and
made Napier's bones, then calculators landed. I've inherited Dad's
slide rule in its battered case, I could do a multiplication with it if
I had to ... then boggle at the other scales.
On 5 Jan 2025 at 16:25:03 GMT, "David" <[email protected]> wrote:
On Sun, 05 Jan 2025 10:00:03 +0000, charles wrote:
In article <[email protected]>,
Pamela <[email protected]> wrote:
On 20:11 4 Jan 2025, Chris Hogg said:
On Sat, 04 Jan 2025 19:34:18 GMT, Pamela
<[email protected]> wrote:
https://www.casio-calculator.com/Museum/Pages/SSS/SL-800%20WE/
Casio%20SL-800%20WE.html
I still have something very similar, except it's a Systema EX4. The
layout is slightly different to this one which is a Systema EX2 and
appears only to have 2 solar cells, whereas the EX 4 has four cells. >>>>> Still works, given a reasonable light source.
https://www.retro-sect.co.uk/product/systema-ex-2-solar-slim-
card-calculator/
The Casio really was thin at 0.8mm, whereas a credit card is 0.76mm
thick. I suppose it was a demonstration of what they could mass
produce.
As far as I remember, Casio's later credit-card models were two or
three times as thick, like many of the competition.
Now I'm becoming nostalgic ... after having had three slide rules, I
bought this as my first calculator.
I've still got my university slide rule bought in 1959! I've also got
my grandfather's slide rule, but its a bit stiff to operate being of
wooden constructon.
I never got my head around how to operate a slide rule.
Don't be silly, any six or seven year old who has been taught sums at
school could learn to use it for multiplication in five minutes.
On 5 Jan 2025 at 16:25:03 GMT, "David" <[email protected]> wrote:
On Sun, 05 Jan 2025 10:00:03 +0000, charles wrote:
I've still got my university slide rule bought in 1959! I've also got my >>> grandfather's slide rule, but its a bit stiff to operate being of wooden >>> constructon.
I never got my head around how to operate a slide rule.
Don't be silly, any six or seven year old who has been taught sums at school could learn to use it for multiplication in five minutes.
On Sun, 1/5/2025 11:25 AM, David wrote:
On Sun, 05 Jan 2025 10:00:03 +0000, charles wrote:
I've still got my university slide rule bought in 1959! I've also got my >>> grandfather's slide rule, but its a bit stiff to operate being of wooden >>> constructon.
I never got my head around how to operate a slide rule.
Seemed to be a maths geek thing.
You would enjoy the round slide rule then.
https://www.ebay.ca/itm/255963555516
On 10:28 6 Jan 2025, wasbit said:
On 04/01/2025 19:34, Pamela wrote:Four of the same calculator? Someone must be a collector.
On 17:11 4 Jan 2025, David said:
I have a strong memory of torches with the same form factor as a
credit card, so they would fit in a wallet.
I've had a quick look but can't find any on line so far.
Does anyone else remember these?
Cheers Dave R
Thinking of which, back in the 1980s I had a Casio credit-card
calculator less than 1mm thick, called the SL-800.
It was fiddly but worked quite well.
https://www.casio-calculator.com/Museum/Pages/SSS/SL-800%20WE/
Casio%20SL-800%20WE.html
I recently found 4 in a drawer, still working, & took then to the
charity shop.
On 04/01/2025 19:34, Pamela wrote:
On 17:11 4 Jan 2025, David said:
I have a strong memory of torches with the same form factor as a credit
card, so they would fit in a wallet.
I've had a quick look but can't find any on line so far.
Does anyone else remember these?
Cheers
Dave R
Thinking of which, back in the 1980s I had a Casio credit-card calculator
less than 1mm thick, called the SL-800.
It was fiddly but worked quite well.
https://www.casio-calculator.com/Museum/Pages/SSS/SL-800%20WE/Casio%20SL-
800%20WE.html
I recently found 4 in a drawer, still working, & took then to the
charity shop.
| Sysop: | Keyop |
|---|---|
| Location: | Huddersfield, West Yorkshire, UK |
| Users: | 715 |
| Nodes: | 16 (2 / 14) |
| Uptime: | 39:26:24 |
| Calls: | 12,109 |
| Files: | 15,006 |
| Messages: | 6,518,388 |
