*Important Full Form* ✍️ IAS --- Indian Administrative Service IPS --- Indian Police service DM --- District Magistrate IRS --- Indian Revenue service IFS --- Indian Foreign service ACP --- Assistant Commissioner of Police ADG --- Additional Director General ASI --- Assistant sub-inspector ASP --- Assistant Superintendent of Police BSF --- Border Security Force CBI --- Central Bureau of Investigation CID --- Criminal Investigation Department CISF --- Central Industrial Security Force CPO --- Central Police organisation DCP --- Deputy Commissioner of Police