APL.SV

APL.SV
Developer	IBM
Released	1973
Array model	flat without boxes
Index origin	<source lang=apl inline>⎕IO</syntaxhighlight>0 or 1
Function styles	defined function
Numeric types	floats (64-bit HFP)
Unicode support	no
Implementation language	BAL
Documentation	User's Manual
Influenced by	APL\360
Influenced	ISO 8485:1989, ISO/IEC 13751:2001, APL2, APL\3000

APL.SV, "APL with Shared Variables", was an enhancement to APL\360 released by IBM in 1973. As the name suggests, APL.SV introduced the concept of a shared variable which could be used by multiple processes. It also included system variables as a kind of shared variable, and system functions. APL.SV also introduced the Format and Execute functions, and the Scan operator.

The enhancements to APL described herein are the result of more than six years of personal experience with APL\360, and countless comments and suggestions from many other users. The shared variable concept goes back in principle to early publication by Falkoff and Iverson, but is was R. H. Lathwell who recognized the practical potential of the idea and, with L. A. Morrow, designed an effective data processing facility based upon it. The system was implemented by Lathwell, Morrow, J. A. Brown, and C. F. Shen, all of whom contributed to the design of the other new features as well. R. J. Creasy first proposed the use of surrogate names. APLSV User's Manual

Primitives

Functions

Glyph	Monadic	Dyadic
<source lang=apl inline>+</syntaxhighlight>	Plus (Identity)	Plus
<source lang=apl inline>-</syntaxhighlight>	Negative	Minus
<source lang=apl inline>×</syntaxhighlight>	Signum	Times
<source lang=apl inline>÷</syntaxhighlight>	Reciprocal	Divide
<source lang=apl inline>⌈</syntaxhighlight>	Ceiling	Maximum
<source lang=apl inline>⌊</syntaxhighlight>	Floor	Minimum
<source lang=apl inline>*</syntaxhighlight>	Exponential	Power
<source lang=apl inline>⍟</syntaxhighlight>	Natural logarithm	Logarithm
</syntaxhighlight>	Magnitude	Residue
<source lang=apl inline>!</syntaxhighlight>	Factorial	Binomial coefficient
<source lang=apl inline>?</syntaxhighlight>	Roll	Deal
<source lang=apl inline>○</syntaxhighlight>	Pi times	Circular
<source lang=apl inline>~</syntaxhighlight>	Not
<source lang=apl inline>∧</syntaxhighlight>		And
<source lang=apl inline>∨</syntaxhighlight>		Or
<source lang=apl inline>⍲</syntaxhighlight>		Nand
<source lang=apl inline>⍱</syntaxhighlight>		Nor
<source lang=apl inline><</syntaxhighlight>		Less
<source lang=apl inline>≤</syntaxhighlight>		Not greater
<source lang=apl inline>=</syntaxhighlight>		Equal
<source lang=apl inline>≥</syntaxhighlight>		Not less
<source lang=apl inline>></syntaxhighlight>		Greater
<source lang=apl inline>≠</syntaxhighlight>		Not equal
<source lang=apl inline>⍴</syntaxhighlight>	Size	Reshape
<source lang=apl inline>,</syntaxhighlight>	Ravel	Catenate, Laminate (allows axis)
<source lang=apl inline>[]</syntaxhighlight>		Index
<source lang=apl inline>⍳</syntaxhighlight>	Index generator	Index of
<source lang=apl inline>↑</syntaxhighlight>		Take
<source lang=apl inline>↓</syntaxhighlight>		Drop
<source lang=apl inline>⍋</syntaxhighlight>	Grade up (allows axis)
<source lang=apl inline>⍒</syntaxhighlight>	Grade down (allows axis)
<source lang=apl inline>/</syntaxhighlight>		Compress (allows axis)
<source lang=apl inline>⌿</syntaxhighlight>
<source lang=apl inline>\</syntaxhighlight>		Expand (allows axis)
<source lang=apl inline>⍀</syntaxhighlight>
<source lang=apl inline>⌽</syntaxhighlight>	Reverse (allows axis)	Rotate (allows axis)
<source lang=apl inline>⊖</syntaxhighlight>
<source lang=apl inline>⍉</syntaxhighlight>	Transpose
<source lang=apl inline>∊</syntaxhighlight>		Membership
<source lang=apl inline>⊥</syntaxhighlight>		Decode
<source lang=apl inline>⊤</syntaxhighlight>		Encode
<source lang=apl inline>⌹</syntaxhighlight>	Matrix inverse	Matrix division
<source lang=apl inline>⍎</syntaxhighlight>		Execute
<source lang=apl inline>⍕</syntaxhighlight>	Monadic format	Dyadic format

Operators

Glyph	Valence	Monadic call	Dyadic call
<source lang=apl inline>/</syntaxhighlight>	Monadic	Reduction (allows axis)
<source lang=apl inline>⌿</syntaxhighlight>	Monadic
<source lang=apl inline>\</syntaxhighlight>	Monadic	Scan (allows axis)
<source lang=apl inline>⍀</syntaxhighlight>	Monadic
<source lang=apl inline>.</syntaxhighlight>	Dyadic		Inner product
<source lang=apl inline>∘.</syntaxhighlight>	Monadic		Outer product
<source lang=apl inline>[]</syntaxhighlight>	Monadic	Axis