Information Technology (IT) translators, like myself, are used to strictly following different reference material. Even when the client has its own glossary and style guide, not always are they totally comprehensive so we have to turn to third-party resources. Luckily, there are some recognized and trusted sources we can follow to base our linguistic decisions on, and not simply throw in anything we like. Personal preference should be our last option.
The most widely used and trusted reference source is Microsoft. Other large IT brands even mention it in their own style guides, instructing the linguist to use it as reference if something is not included in their material. Microsoft has recently (late last year) updated their Writing Style Guide (you can download the PDF for free in the link). It contains topics related to capitalization, punctuation, numbers, URLs and web addresses, everything one expects from an IT style guide. This guide applies to the English language, but you can also find one for your language here (including Brazilian Portuguese, last updated on June 2017). The language-specific style guides are only downloadable (also free of charge); they are not available online.
Microsoft also has an online Language Portal where you can search for terms in different languages, including Brazilian Portuguese. It shows results in its Terminology Collection and in localized Microsoft products in three columns: English, Translation and Definition/Product. This is a fantastic resource! It’s bookmarked in my browser so I can easily access it whenever I need, which is every day.
Apple, another trusted source, also provides its style guide online (in English).
If you know of any other publicly available IT style guide and/or glossary, please feel free to share it in the comments.