grammatical number - Is the plural form of ID spelled ID's or ID ...
Yes, it can depend on the style guide you're using, but since you're clearly not using a style guide, the plural of cat is cats, and the plural of ID is IDs. Simple as that. There is no reason to even consider an apostrophe. It conveys no additional information that the simple -s does not. As to "how to tell", what do you mean?

What is the etymology of ID (or I.D.), as in something used for ...
Word forms: plural ID's or IDs. identification; US a card (ID card) or document, as a birth certificate, that serves to identify a person, prove one's age, etc. ADJECTIVE. of or for identification an ID card; VERB TRANSITIVE Word forms: ID'd or IDed, ID'ing or IDing. to identify; Also I.D. "ID/"I.D." was used at least a decade before 1955.

有什么好听的游戏ID名字? - 知乎
本来是我闺蜜和我的游戏id，但现在闹掰了，她也改了别的. 出自杜牧的《宣州送裴坦判官往舒州》 日暖泥融雪半消， 行人芳草马声骄。 九华山路云遮寺， 清弋江村柳拂桥。 君意如鸿高的的， 我心悬旆正摇摇。 同来不得同归去， 故国逢春一寂寥. 11月29日！

abbreviations - Which one is correct: Id or ID? - English Language ...
ID can be a shortened form of other words/phrases besides identifier. For example, "ID" can be a shortened form of identification card (e.g., "May I see an ID, please?"), or even the verb identify (as in, "The victim was able to ID the robbery suspect"). –

Steam验证后总是出现会您对 CAPTCHA 的响应似乎无效。请在下方重新验证您不是机器人。怎么办？ - 知乎
知乎，中文互联网高质量的问答社区和创作者聚集的原创内容平台，于 2011 年 1 月正式上线，以「让人们更好的分享知识、经验和见解，找到自己的解答」为品牌使命。知乎凭借认真、专业、友善的社区氛围、独特的产品机制以及结构化和易获得的优质内容，聚集了中文互联网科技、商业、影视 ...

如何把苹果账号 (Apple ID) 更改到美国地区？ - 知乎
首先这种作死的行为我也做过，当初注册一个美区 Apple ID，但是美区商店没有印象笔记，又懒得退出重新登录国区 Apple ID。和问题中一样，将国家从美国改成中国。

有问题，就会有答案 - 知乎
知乎，中文互联网高质量的问答社区和创作者聚集的原创内容平台，于 2011 年 1 月正式上线，以「让人们更好的分享知识、经验和见解，找到自己的解答」为品牌使命。知乎凭借认真、专业、友善的社区氛围、独特的产品机制以及结构化和易获得的优质内容，聚集了中文互联网科技、商业、影视、时 ...

2025年 5月 显卡天梯图（更新RTX 5060Ti） - 知乎
显卡天梯图主要是根据传统光栅性能排名的. 购买之前可以先领知乎官方京东红包~ ...

知乎 - 有问题，就会有答案
知乎，中文互联网高质量的问答社区和创作者聚集的原创内容平台，于 2011 年 1 月正式上线，以「让人们更好的分享知识、经验和见解，找到自己的解答」为品牌使命。知乎凭借认真、专业、友善的社区氛围、独特的产品机制以及结构化和易获得的优质内容，聚集了中文互联网科技、商业、影视 ...

What do we call the “rd” in “3ʳᵈ” and the “th” in “9ᵗʰ”?
@WS2 In speech, very nearly always. In writing, much less so. I think what may be going on is that one just assumes that “June 1” is pronounced “June First”, or “4 July” as “the Fourth of July”.