This guide contains descriptive and evaluative information on 47 major commercially-available English-as-a-Second-Language (ESL) tests in current use around the world. For each test, the following information is provided: complete title; acronym; publication date; targeted audience; intended purpose; scoring method; administration type (group or individual); test length; test components; costs; author(s); publisher, including complete address and telephone number; a review, which includes a description of the test and discussion of its reliability, validity, and related issues; and test and reviewer's references. An introductory section offers guidance on the use of the reviews, uses and misuses of testing, and purposes of testing (placement, measuring achievement, diagnosis, measuring proficiency). In addition, two sections provide an introduction to ESL proficiency testing in North America and an overview of ESL testing in Britain. (MSE)