# November 1977 - Vol. 20 No. 11

## Features

Considerations for future programming language standards activities

Use of the LRU stack depth distribution for simulation of paging behavior

The aliasing problem in computer-generated shaded images

Concurrent reading and writing

Anomalous behavior of the fifty-percent rule in dynamic memory allocation

What can we do about the unnecessary diversity of notation for syntactic definitions?

A note on reflection-free permutation enumeration

The optimal approach to recursive programs

A very high level programming language for data processing applications

Perfect hashing functions: a single probe retrieving method for static sets

An algorithm for reduction of operator strength

Improving programs by the introduction of recursion

Dynamic memory allocation in computer simulation

An encoding method for multifield sorting and indexing

Some theorems to aid in solving the file allocation problem