```erlang 库 作用 模块 erts Erlang Run-Time System Application erlang系统运行时启动的应用 函数 erlang内置函数（BIF） init系统启动  reboot,restart,stop zlib压缩与解压  zip,unzip,gzip,gunzip erl_driver驱动 abs, date, time, element, exit, float, get, halt, hash, is_*, length, link, md5, memory, min, now put, register, round, self, size, spawn, spawn_link, time, trunc, unlink, unregister, whereis... stdlib 标准库 STDLIB, array, base64, beam_lib, c, calendar, dets, dict, digraph, digraph_utils, epp, erl_eval, erl_expand_records erl_id_trans, erl_internal, erl_lint, erl_parse, erl_pp, erl_scan,erl_tar,ets,file_sorter,filelib,filename gb_sets,gb_trees,gen_event,gen_fsm,gen_server,io,io_lib,lib,lists,log_mf_h,math,ms_transform,orddict ordsets,pg,pool,proc_lib,proplists,qlc,queue,random,re,regexp,sets,shell,shell_default,slave,sofs,string supervisor,supervisor_bridge,sys,timer,unicode,win32reg,zip kernel 核心库 kernel,application,auth,code,disk_log,erl_boot_server,erl_ddll,erl_prim_loader,erlang, error_handler,error_logger,file,gen_tcp,gen_udp,gen_sctp,global,global_group,heart,inet, init,net_adm,net_kernel,os,pg2,rpc,seq_trace,user,wrap_log_reader,zlib,app,config,packages odbc mnesia 数据库 snmp SNMP cos CORBA compile Erlang Compiler SASL System Application Support Libraries (SASL) ```