noun, informal
participant in informatics olympiads (such as NOI and NOIP) (Classifier: 名; 位; 個／个)
一天在論壇上轉悠，突然發現一個很特別的帖子，欣然點開一看，原來是一個剛參加完分區聯賽的OIer寫的“訣別信”。
一天在论坛上转悠，突然发现一个很特别的帖子，欣然点开一看，原来是一个刚参加完分区联赛的OIer写的“诀别信”。
yī tiān zài lùn tán shàng zhuǎn yōu ， tū rán fā xiàn yī ge hěn tè bié de tiě zi ， xīn rán diǎn kāi yī kàn ， yuán lái shì yī ge gāng cān jiā wán fēn qū lián sài de ＯＩｅｒ xiě de “ jué bié xìn ” ． I was wandering on the forums one day when I suddenly found a special post. I joyfully opened it, and found that it was a "farewell letter" from an OIer who had just finished a sectional league match.
[…[[#Chinese|]]]，正是這些極具挑戰性的特徵，極大地激發了廣大師生積極參與的熱情，讓眾多的OIer沉迷其中，不亦樂乎。
[…[[#Chinese|]]]，正是这些极具挑战性的特征，极大地激发了广大师生积极参与的热情，让众多的OIer沉迷其中，不亦乐乎。
… ， zhèng shì zhè xiē jí jù tiǎo zhàn xìng de tè zhēng ， jí dà dì jī fā le guǎng dà shī shēng jī jí cān yù de rè qíng ， ràng zhòng duō de ＯＩｅｒ chén mí qí zhōng ， bù yì yuè hū ． […], and it's these very challenging features that greatly arouse the enthusiasm of many students and teachers alike for participating, and allow participants in informatic olympiads to indulge in their activities.
很多OIer（信息學愛好者）在互聯網上建立了自己的網站或博客，我校OIer也建立了信息學OJ或博客，開闢了“OI簡介、熱點問題、題目列表、專題討論、題解、常用軟件下載”等欄目。
很多OIer（信息学爱好者）在互联网上建立了自己的网站或博客，我校OIer也建立了信息学OJ或博客，开辟了“OI简介、热点问题、题目列表、专题讨论、题解、常用软件下载”等栏目。
hěn duō ＯＩｅｒ （ xìn xī xué ài hǎo zhě ） zài hù lián wǎng shàng jiàn lì le zì jǐ de wǎng zhàn huò bó kè ， wǒ xiào ＯＩｅｒ yě jiàn lì le xìn xī xué ＯＪ huò bó kè ， kāi pì le “ ＯＩ jiǎn jiè ， rè diǎn wèn tí ， tí mù liè biǎo ， zhuān tí tǎo lùn ， tí jiě ， cháng yòng ruǎn jiàn xià zǎi ” děng lán mù ． Many OIers (informatic enthusiasts) have created their own websites or blogs on the Internet. The OIers in our school have also founded "Informatics OJ" blog, and started the columns "Introduction to OI, topics of general interest, lists of questions, discussions of specific topics, solutions, downloading common software" and so on.
一場拯救可橙的行動在線上和線下展開，可橙的跨性別朋友、北京同志中心團隊、曾舉報豫章書院的温柔團隊、OIer（信息學奧賽選手）救援團隊等，一起加入，[…[[#Chinese|]]]
一场拯救可橙的行动在线上和线下展开，可橙的跨性别朋友、北京同志中心团队、曾举报豫章书院的温柔团队、OIer（信息学奥赛选手）救援团队等，一起加入，[…[[#Chinese|]]]
yī chǎng zhěng jiù kě chéng de xíng dòng zài xiàn shàng hé xiàn xià zhǎn kāi ， kě chéng de kuà xìng bié péng yǒu ， běi jīng tóng zhì zhōng xīn tuán duì ， céng jǔ bào yù zhāng shū yuàn de wēn róu tuán duì ， ＯＩｅｒ （ xìn xī xué ào sài xuǎn shǒu ） jiù yuán tuán duì děng ， yī qǐ jiā rù ， … A mission to save Kecheng was carried out both online and offline. Kecheng's transgender friends, the team at the Beijing LGBT Center, the team lead by Wenrou who had reported Yuzhang College, the OIer (participants in informatics olympiads) support team and so on has joined in on the action, […]
Examples (Wiktionary)
Mandarin
一天在论坛上转悠，突然发现一个很特别的帖子，欣然点开一看，原来是一个刚参加完分区联赛的OIer写的“诀别信”。
一天在論壇上轉悠，突然發現一個很特別的帖子，欣然點開一看，原來是一個剛參加完分區聯賽的OIer寫的“訣別信”。
yī tiān zài lùn tán shàng zhuǎn yōu ， tū rán fā xiàn yī ge hěn tè bié de tiě zi ， xīn rán diǎn kāi yī kàn ， yuán lái shì yī ge gāng cān jiā wán fēn qū lián sài de ＯＩｅｒ xiě de “ jué bié xìn ” ．
I was wandering on the forums one day when I suddenly found a special post. I joyfully opened it, and found that it was a "farewell letter" from an OIer who had just finished a sectional league match.
Mandarin
[…[[#Chinese|]]]，正是这些极具挑战性的特征，极大地激发了广大师生积极参与的热情，让众多的OIer沉迷其中，不亦乐乎。
[…[[#Chinese|]]]，正是這些極具挑戰性的特徵，極大地激發了廣大師生積極參與的熱情，讓眾多的OIer沉迷其中，不亦樂乎。
… ， zhèng shì zhè xiē jí jù tiǎo zhàn xìng de tè zhēng ， jí dà dì jī fā le guǎng dà shī shēng jī jí cān yù de rè qíng ， ràng zhòng duō de ＯＩｅｒ chén mí qí zhōng ， bù yì yuè hū ．
[…], and it's these very challenging features that greatly arouse the enthusiasm of many students and teachers alike for participating, and allow participants in informatic olympiads to indulge in their activities.
Mandarin
很多OIer（信息学爱好者）在互联网上建立了自己的网站或博客，我校OIer也建立了信息学OJ或博客，开辟了“OI简介、热点问题、题目列表、专题讨论、题解、常用软件下载”等栏目。
很多OIer（信息學愛好者）在互聯網上建立了自己的網站或博客，我校OIer也建立了信息學OJ或博客，開闢了“OI簡介、熱點問題、題目列表、專題討論、題解、常用軟件下載”等欄目。
hěn duō ＯＩｅｒ （ xìn xī xué ài hǎo zhě ） zài hù lián wǎng shàng jiàn lì le zì jǐ de wǎng zhàn huò bó kè ， wǒ xiào ＯＩｅｒ yě jiàn lì le xìn xī xué ＯＪ huò bó kè ， kāi pì le “ ＯＩ jiǎn jiè ， rè diǎn wèn tí ， tí mù liè biǎo ， zhuān tí tǎo lùn ， tí jiě ， cháng yòng ruǎn jiàn xià zǎi ” děng lán mù ．
Many OIers (informatic enthusiasts) have created their own websites or blogs on the Internet. The OIers in our school have also founded "Informatics OJ" blog, and started the columns "Introduction to OI, topics of general interest, lists of questions, discussions of specific topics, solutions, downloading common software" and so on.
A mission to save Kecheng was carried out both online and offline. Kecheng's transgender friends, the team at the Beijing LGBT Center, the team lead by Wenrou who had reported Yuzhang College, the OIer (participants in informatics olympiads) support team and so on has joined in on the action, […]