Purchase Print Copy

 FormatList Price Price
Add to Cart Paperback9 pages $20.00 $16.00 20% Web Discount

A description of a block-programming facility that Rand has incorporated into the basic IBM-360 software. This new facility alters the form of the machine language enough to change the way programmers conceive of and code problems. By means of a set of macros, users can write a program as a hierarchical set of instruction blocks whose execution is controlled by conditional statements, thus providing, at the assembly code level, the IF-THEN-ELSE facility of ALGOL and PL/I. Other conditional statements can occur within an IF block. A formatting program automatically indents the program listing to reflect its structure and provides headings for the beginning and end of each block, adding greatly to program readability and self-documentation. Lines added by the program are immediately recognizable because the line numbers are suppressed, distinguishing them from lines produced by the O/S assembler. 9 pp.

This report is part of the RAND Corporation Paper series. The paper was a product of the RAND Corporation from 1948 to 2003 that captured speeches, memorials, and derivative research, usually prepared on authors' own time and meant to be the scholarly or scientific contribution of individual authors to their professional fields. Papers were less formal than reports and did not require rigorous peer review.

Our mission to help improve policy and decisionmaking through research and analysis is enabled through our core values of quality and objectivity and our unwavering commitment to the highest level of integrity and ethical behavior. To help ensure our research and analysis are rigorous, objective, and nonpartisan, we subject our research publications to a robust and exacting quality-assurance process; avoid both the appearance and reality of financial and other conflicts of interest through staff training, project screening, and a policy of mandatory disclosure; and pursue transparency in our research engagements through our commitment to the open publication of our research findings and recommendations, disclosure of the source of funding of published research, and policies to ensure intellectual independence. For more information, visit www.rand.org/about/principles.

The RAND Corporation is a nonprofit institution that helps improve policy and decisionmaking through research and analysis. RAND's publications do not necessarily reflect the opinions of its research clients and sponsors.