Lower the boom on the lowly pronoun

Careless use of certain pronouns in technical writing today causes communication to be a fuzzy and inept as many other writing flaws. The pronouns most commonly misused are the demonstratives, this and that with their plurals these and those; such relatives as which, who, whom, and that, and the anticipatory expletive it. Eliminating the irritating and confusing aspects of these often misused pronouns is simple. More effective and efficient technical communication will result.