A Big database for small calculators. Last database update : 04-21-2014 Home Presentation Database How to ... Gallery Links Thanks Updates Changer de langue		Pictures Model Aka Version Intro date End date Type Last update Progr RAM ROM Nb functions Alpha Nb keys Display type Display Graph XY Ext Print Sav Clock             Microprocessor                                     Functions                         Size Weight Batteries Ext power Power Twin Made in Link(s)                                                 Remarks                                                    Rockwell Pictures Model Aka Version Intro date End date Type Last update Progr RAM ROM Nb functions Alpha Nb keys Display type Display Graph XY Ext Print Sav Clock             Microprocessor                                     Functions                         Size Weight Batteries Ext power Power Twin Made in Link(s)                                                 Remarks                                                 201     1973 >=1973 4 funct 2010_02_17 N 1   5+2mem N 20 VFD 8. + 2led N N N N N   % RM CM 160x85x45   4xAA Y     Mexico     202 SLIDE RULE   197x   Scient 2008_05_06 N 1   21+6mem N 20 VFD 8. N N N N N   <-> +/- lnx logx Sqrt e^x 10^x x^y sin cos tan Pi 1/x asin acos atan DR X<>M X<-M X->M M+X^2 M+ M- 160x85x45   4xAA 6VDC 130mA   Mexico     203 METRIC CONVERTER   197x   4 funct+metric conv 2009_03_20 N 1   Metric conv N 20 VFD 8+2LEDs N N N N N   Metric conv 160x85x45   4xAA 6VDC   Same functions than Sears 801.58840 Mexico     204 FINANCIER FINANCIER   <=1974 >=1974 4 funct+finance 2007_12_08 N 1   10+10fin N 20 VFD 8+2LEDs N N N N N Rockwell A4061PA financial 160x85x45 208gr 4xAA 6VDC           10R     <=1974 >=1975 4 funct 2008_05_06 N 0   4 N 16 LED 8. N N N N N Rockwell A5000PA   140x76x22 116gr 1x9V 9VDC     Mexico     20R Memory 20R   <=1974 >=1975 4 funct 2010_02_10 N 1   5+2mem N 20 LED 8 1/2 N N N N N Rockwell A5300PA % MR M 155x76x23 134gr 1x9V 7V5DC - 9VDC     Mexico     30R SLIDE RULE MEMORY   <=1974 >=1975 4 funct 2008_05_06 N 1   10+5mem N 24 LED 8 1/2 N N N N N Rockwell A4612PA 2xTI SN75492A (display drivers) X<>Y % Sqrt 1/X X^2 +/- X<>M MR M- M+ 155x76x23 134gr 1x9V 9VDC     Great Britain, Mexico   Uses a charger called 01R which was sold apart. 51R CONVERTER   <=1974 >=1974 4 funct + Metric converter 2008_05_06 N 1   Metric conv N 20 VFD 8 N N N N N Rockwell A4004PC Metric conv 157x84x28 270gr with batt 4xAA sealed 6VDC           61R ADVANCED SLIDE RULE   <=1974 >=1974 Scient 2010_02_17 N 1   21+6mem N 20 VFD 8 N N N N N Rockwell A4002 <-> +/- lnx logx Sqrt e^x 10^x x^y sin cos tan Pi 1/x asin acos atan DR X<>M X<-M X->M M+X^2 M+ M- 156x84x24 278gr with batt 4xAA sealed 6VDC     Mexico     80R     <=1974 >=1974   2008_05_06 N       N       N N N N N                       12R     <=1975 >=1975 4 funct 2008_05_06 N 0   5 N   LED   N N N N N   Sqrt 140x76x22   1x9V             14RD Automatic Percent   <=1975 >=1975 4 funct 2008_05_06 N 0   5 N 18 VFD 8+1LED N N N N N Rockwell A5901OA or A5911CA % 155x76x25 150gr 4xAA 6VDC           18R MEMORY   <=1975 >=1976 4 funct 2010_02_10 N 1   5+2mem N 20 LED 8. N N N N N Rockwell B5000CB or B5000CC % STO RCL 155x76x22 130gr 1x9V 9VDC     Great Britain   Same model as the 8R model but with 1 memory. Comes in 2 slightly different cases. 21R MEMORY   <=1975 >=1975 4 funct 2008_05_06 N 1   5+6mem N 20 LED 8 1/2 N N N N N Rockwell A5300PD % MR M/ Mx M- M+ MC 155x76x22 ? 140gr 1x9V 9VDC           the 24K 24K   <=1975 >=1976 4 funct 2008_05_06 N 1   8+4mem N 25 VFD 8 1/2 N N N N N Rockwell A5901CA <-> Sqrt % +/- MC MR M- M+ 142x70x12 140gr with batt 3xbig1V5cell sealed 4V5DC           24RD     <=1975 >=1975 4 funct 2005_12_21 N 1   8+4mem N 24 VFD 8.+2LEDs N N N N N Rockwell A5901CA Sqrt +/- % MR MC M+ M- 155x75x23 156gr 4xAA 6VDC           31R   1 <=1975 >=1975 4 funct 2008_05_06 N 1   10+5mem N 24 LED 8 1/2 N N N N N Rockwell A5502P X<>Y % Sqrt 1/X X^2 +/- X<>M MR M- M+ 155x76x23 176gr with batt 1x9V 9VDC           31R SLIDE RULE MEMORY 2 <=1975 >=1975 4 funct 2008_05_06 N 1   10+5mem N 24 LED 8 1/2 N N N N N Rockwell A5502PB X<>Y % Sqrt 1/X X^2 +/- X<>M MR M- M+ 155x76x23 132gr 1x9V 9VDC           63R SCIENTIFIC SLIDE RULE   <=1975 >=1976 Scient 2008_05_06 N 1   26+8mem N 25 VFD 8 1/2 + 2 1/2 N N N N N Rockwell A4802CB EE +/- [( )] <-> Pi 1/x e^x 10^x Y^x LN LOG Sqrt sin asin cos acos tan atan R->D D->R X! STO MC RCL X<->M Mx M/ M+ M- 160x85x24 246gr with batt 3xAA sealed Y   Radio Shack EC-490 Mexico   Mainly differs from the version II in the keys colors. 63R II SCIENTIFIC SLIDE RULE   <=1975 >=1976 Scient 2008_05_06 N 1   26+8mem N 25 VFD 8 1/2 + 2 1/2 N N N N N Rockwell A4802CA EE +/- [( )] <-> Pi 1/x e^x 10^x Y^x LN LOG Sqrt sin asin cos acos tan atan R->D D->R X! STO MC RCL X<->M Mx M/ M+ M- 160x85x24 248gr with batt 3xAA sealed Y   Radio Shack EC-490 Mexico   Mainly differs from the 1st version in the keys colors. 8R AUTOMATIC PERCENT   <=1975 >=1976 4 funct 2010_06_29 N 0   5 N 18 LED 8. N N N N N Rockwell B5000CB % 155x76x23 120gr 1x9V 9VDC   Rockwell 9TR Hong Kong, Mexico   Same model as the 18R model but without memory. 9TR     <=1975 >=1976 4 funct 2008_05_06 N 0   5 N 18 LED 8. N N N N N Rockwell B5000CB % 155x76x23 122gr 1x9V 9VDC   Rockwell 8R Mexico     '76     1975-76   4 funct 2008_05_06 N 1   5+2mem N 20 LED   N N N N N   % STO RCL 155x76x23   1x9V Y         To commemorate USA bicentennial. 14RD-II Automatic Percent   <=1976 >=1977 4 funct 2010_02_10 N 0   5 N 18 VFD 8 1/2 N N N N N Rockwell A5901CA or A5901CB % 155x76x25 134gr 3xAA 4V5DC     Japan   There are 4 places for batteries, but the fourth position cannot be filled. 21KII     1976 >=1976 4 funct 2010_02_10 N       N       N N N N N                       the 22K 22K   <=1976 >=1978 4 funct 2008_05_06 N 1   7+4mem N 24 VFD 8 1/2 N N N N N   +/- Sqrt % MC MR M- M+ 137x74x14 94gr 3xAAA Y     Japan     The 22MS 22MS   197x   4 funct 2008_05_06 N 1   7+4mem N 24 VFD 8 N N N N N   +/- Sqrt % MC MR M- M+ 137x74x14   3xAAA Y           the 24K II 24K II   <=1976 >=1976 4 funct 2009_06_11 N 1   8+4mem N 25 VFD 8 1/2 N N N N N Rockwell A5901CA <-> Sqrt % +/- MC MR M- M+ 137x74x14 92gr 3xAAA sealed 4V5DC     Japan     The 24MS 24MS   <=1976 >=1976 4 funct 2008_05_06 N 1   8+4mem N 25 VFD 8 1/2 N N N N N Rockwell A5901CA <-> Sqrt % +/- MC MR M- M+ 142x70x12 144gr with batt 3xbig1V5cell sealed Y           24MS II     >=1976 >=1976 4 funct 2008_05_06 N 1     N   VFD   N N N N N   Sqrt +/- % 142x70x12   sealed Y           24RD-II 24RD II   <=1976 >=1976 4 funct 2010_02_10 N 1   7+4mem N 24 VFD 8 1/2 N N N N N Rockwell A5901CA or A5901CB Sqrt +/- % MR MC M+ M- 155x76x23 156gr 3xAA 4V5DC     Japan   There are 4 places for batteries, but the fourth position cannot be filled. 44RD     <=1976 >=1976 Scient 2013_04_17 N 1   23+2mem N 36 VFD 8 1/2 N N N N N Rockwell A6500CA sin asin cos acos tan atan Pi Ln e^x Log 10^x Sqrt EE 1/X X^2 (( )) +/- Y^x STO RCL 155x75x23 134gr 3xAA 4V5DC     Japan     64RD     <=1976 >=1976 Scient 2010_02_10 N 1   25+3mem N 37 VFD 8 1/2 +2 1/2 N N N N N Rockwell A4806CB (7615) x<>y (Sin Cos Tan ln log P>R Deg Sqrt)+INV Pi EE 1/x ( ) +/- y^x Sto M+ RCL 155x87x25 152gr 4xAA 6VDC     Japan   Same functions and µProcessor than Rockwell Royal 12HTA. the 74K 74K   <=1976 >=1976 Scient 2008_05_06 N 1   26+8mem N 25 VFD 8 N N N N N   EE +/- Pi [( )] <-> e^x 10^x Y^x 1/x x! LN LOG Sqrt sin cos tan asin acos atan R->D D->R STO MC X<>M M/ M- M* M+ RCL 137x74x14   sealed Y           the 18T 18T   1976-77   4 funct 2010_10_31 N 1   5+2mem N 20 VFD 8. +1 N N N N N CF589 % STO RCL 138x75x16 90gr 3xAAA 4V5DC     Hong Kong   Has a 9 positions display but display only 7 digits on negativ numbers. the 20T 20T   <=1977 >=1977 4 funct 2008_05_06 N 1   6+4mem N 23 VFD 8 1/2 N N N N N CF589 % +/- MR MC M+ M- 138x75x16 92gr 3xAAA 4V5DC         Has a 9 positions display but display only 7 digits on negativ numbers.

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