Calculators database rules

Main page database fields follow these rules:

Brand and Model

It's simply the official name of the calculator. What is reported is exactly what appears on the calculator (capital/lowercase letters, numbers and punctuation signs included), and NOT what is printed on the box, in the manual or on some paper of the blister package: sometimes they differ!
(my intention is stricter than me)


It's the Serial Number (or any code number found onto the calculator itself). If it's unavailable, **missing** is reported.

Manufacture Date

It's the date in which the calculator was assembled/built (nothing more than a year and - possibly - a month). Of course this date is only indicative, because the only way to establish the right date is to open the calculator and retrieve the date from the Integrated Circuit Serial Number. But since I'm not an expert in disassembling hardware, I avoid doing it.

These are two useful links to understand calculators dating: I follow their rules. In case you want to see, here's my personal page with some notes about calculators dates.


It's the input mode of the calculator; classic modes are:
Comparing them, we obtain:
RPN/RPL 60 sin 34.5 +
equation sin 60 + 34.5 =
algebraic 60 sin + 34.5 =
Other modes are:

Programmable (max steps|bytes)

It's the indication whether the calculator is programmable or not, according to the following classes:

No programming
Keystroke programming Programming languages
Other languages may be reported with their proper names if they don't conform to the previous definitions.

The dimension of the maximum number of steps/bytes is enclosed into parenthesis, with the following rules:
The maximum steps number alone is useless if memory registers belong to the same storage area and their spaces overlap, so take this value with care.


It's the indication whether a calculator is accompanied by an official manual or some sort of documentary sheet. Data are:
If the indicator appears in green, like that, the manual is not directly associated with the calculator; instead, I bought the calculator (used) without any manual, and gathered the manual somewhere else, associating both successively. Thus, this manual won't appear in the My manual section.


It's the indication whether a calculator is protected by some pouch or cover, according to the following classes:

Power Source

Reported information follows standard IEC batteries names (as in Energizer's technical documentation).
If two power source types are supplied, then:
Notes (at the bottom there's a table reporting batteries equivalence among various manufacturers):
Batteries equivalence among various manufacturers (technical documentation links where available)
- if two or more types are produced, tthe most common and/or the most suitable for calculators is chosen -
IEC Name Energizer Duracell Varta Panasonic Renata Maxell Kodak
LR03 (AAA) E92 MN2400 4103 graph AM-4 - AAA K3A
LR06 (AA) E91 MN1500 4106 graph AM-3 - AA KAA
LR14 (C) E93 MN1400 4114 graph AM-2 - C KC
LR20 (D) E95 MN1300 4120 graph AM-1 - D KD
6LR61 (9V) 522 MN1604 4922 graph 6AM-6 - 9V K9V
LR43 186 - V12GA graph - LR43 LR43L -
LR44 A76 - V13GA graph LR44 LR44 LR44 KA76
LR54 189 - V10GA graph -
- LR1130L -
SR43 386-301 / 301 D301/386 V301 graph -
386 SR43W -
SR44 357-303 (H) / EPX76 D303/357 V357 (HC) graph G13 357 SR44W KS76
SR54 390-389 / 389 / 390 D389/390 V390 graph -
389 SR1130W -
SR57 395-399 D395/399 V399 graph -
399 SR927W -
CR1220 CR1220 - CR1220 graph CR1220
CR1220 CR1220 -
CR2016 CR2016 DL2016 CR2016 graph CR2016 CR2016 CR2016 KCR2016
CR2025 CR2025 DL2025 CR2025 graph CR2025 CR2025 CR2025 KCE2025
CR2032 CR2032 DL2032 CR2032 graph CR2032 CR2032 CR2032 KCR2032

(data verified at each manufacturer's site in February 2007, and checked against Italian shop-available batteries)
- guess what's my favorite manufacturer! -

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