Lazy I/O is not the answer
Hal Perkins · ACM SIGPLAN Notices · 1981
Synchronization problems with input from terminal devices in Pascal have existed for several years. Recently, a technique known as "lazy I/O" has achieved popularity with implementors, and the latest published version of the draft ISO Pascal Standard is carefully worded to allow its use. This paper contends that lazy I/O is not an adequate general solution to the problem, and a simple solution that has been used successfully in several implementations is proposed as an alternative.