Marketed by: 
Wang Laboratories, Inc. 
Model Number: 
System #1: 2A 

System #2: 2AD (Has Option Column Printer Output Interface) 
Serial Number: 
Two Units in Museum 

System #1: 3070 

System #1 Card Reader (FirstDesign): 23241 

System #2: 3086 

System #2 Card Reader (SecondDesign): 24209 
Date of Manufacture: 
System #1: August, 1967 

System #2: September, 1967 
Manufactured In: 
USA, Tweksbury, Massachusetts 
Introduced: 
January, 1965; LOCI 2A: July, 1965 
Original Price: 
$2750 Base to $8450 FullyOptioned 
Weight: 
45 pounds 
Size: 
17" Wide, 17" Deep, 11 1/2" High 
Power Requirement: 
80 Watts, 115 VAC, 60Hz 
Display Technology: 
"Top View" Nixie Tubes made by National Electronics


Ten "09" Nixie Tubes


One "Sign" (+/) Nixie Tube


Discrete Neon Sign Decimal Point Indicators


Discrete Neon Programmer and Status Indicators

Logic Technology: 
Discrete Transistor, 1,275 Transistors (Base System) 

Nine PlugIn Circuit Boards, 8 16 1/2"x9", 1 16 1/2"x5" (Base System) 

Optional 10th Interface Board (Options C,D) 

16x12x4 Ferrite Core Memory for Memory Registers 
Digits of Capacity: 
10 digits plus sign. No zero suppression. 
Decimal Modes: 
Fully automatic, w/user override on systems without I/O expansion 
Arithmetic Logic: 
Arithmetic for Add/Subtract 

Use of logarithms for Multiplication/Division 
Math Functions: 
Add, Subtract, Multiply, Divide 

Square Root, 1/Square Root, x², 1/x²


Base e Antilogarithm 
Constant: 
No 
Memories: 
Base System: 2 Store/Recall Memory Registers 

Option A: 16 Store/Recall Memory Registers organized as four banks of four registers each 

Memory registers are nonvolatile due to implementation with magnetic core memory 
Programmable: 
Yes, via optional LOCI Punched Card Reader or Manual Entry of Instructions (one at a time) from console 

80 Program Steps Per Card 

Option B: Second Punched Card Reader for programs up to 160 Steps 
Peripherals/Options: 
Option A: 16 Memory Registers 

Option B: Second Punched Card Reader 

Option C: Teletype Model ASR33 I/O Interace 

Option D: Column Printer Output Interface 

Option H: ASR33 Teletype for use with Option C 
Performance: 
Addition/Subtraction: 0.5ms average 

Multiplication/Division/Logarithm/Square Root: 40ms average 
Notes: 
Wang Laboratories' first production programmable calculator 

LOCI 2A Model added 16 magnetic core memorybased storage registers to the base LOCI 2 