est.

劍橋詞典

written abbreviation for estimated
估計；估算；估價（estimated 或 estimate的縮寫）
the town of Brownford (est. population 14,000) 布朗福德鎮(zhèn)（估計人口14000人）

written abbreviation for established : used with a date to show when a company or organization was begun
建立于；設立于；創(chuàng)立于（established的縮寫）
P. R. Jones & Co, Est. 1920 P.R.瓊斯公司，創(chuàng)立于1920年 返回 est.