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Details about  Sharp Model EL-5103 Scientific Calculator XX Rare

Sharp Model EL-5103 Scientific Calculator XX Rare See original listing
Sharp-Model-EL-5103-Scientific-Calculator-XX-Rare
Item Sold
Item condition:
Used
Ended:
Mar 11, 2012 09:53:19 PDT
Winning bid:
US $78.95
1 bid ]
Shipping:
$2.68 Standard Shipping | See details
Item location:
Marietta, United States

Description

eBay item number:
350543272365
Seller assumes all responsibility for this listing.

Item specifics

Condition:

Used

 
 
Sharp Model EL-5103 Scientific Calculator XX Rare
This auction is for a Sharp El-5103 Scientific calculator. The calculator is in good working order. Cosmetically it is in fair condition. There is a big scratch in the display bezel, there are intials etched in the face. The buttons are very worn. This is a very rare calculator and I have only seen one other come up for auction. I will be happy to answer any questions you have,

The el-5103 is probably sharp's finest pocket scientific model and ahead of its time in many ways. its a fairly rare machine appearing briefly in the gap between their older scientific models like the el-512 and the later basic programmable pocket computers like the pc 1251
a very nicely designed machine and a pleasure to use, small, slim and pocket sized. the buttons are excellent and the display is an alpha numeric, dot-matrix. this was a rarity in calculators of its time and the only other alpha capable machines nearby were the hp 41c and casio fx 602p the sharp's alpha capability is limited, however, because it is not truly programmable.
the true purpose of the alpha numeric display is formula entry and in this regard makes this machine one of the earliest formula entry models. the formula expression evaluation of up to 80 steps is superb, with implied multiplication for brackets and number prefixes to functions. for example
2sin1, 2(3+√5) and 1÷2π all do the expected thing. rather than having an ans key (like today), the last expression can be recalled with PB (playback) and re-edited, then re-evaluated. this does create a difficulty because you cannot immediately operate on a previous result (like you might today press √ ans).
although not truly programmable, several early and pioneering versions of expression programming are available. a selector switch chooses between
AER (algebraic expression reserve) and COMP modes. these parallel the concepts of program and run modes on programmable machines. in AER mode a (single) expression of up to 48 steps involving variables A-E and M can be accommodated. on switching back to comp mode, the expression can be evaluated in terms of the current contents of the variables by pressing the COMP button. another variant allows an expression to be reserved as a function of given variables. for example f(AB) = √(A² + B²) defines a function of two unknowns A and B. in comp mode, the COMP button will prompt the user for values of the unknowns then proceed to evaluate the expression.the rest of the features are a familiar set of scientific functions including hyperbolics and 2d stats. the stats is a special mode (on the switch) that reassigns the A-E memories to stats storage.



Terms: Payment is expected 5 days after close of auction. I accept Paypal.Winning bidder is responsible for shipping and handling. I ship USPS First Class Mail. I ship to the Continental US Only .


 _gsrx_vers_335 (GS 5.5 (335))

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