变量常用缩写

遵循通用规范，只使用显而易见的缩写，不要滥用，不要有歧义。

变量名	常用缩写
application	app
arguments	args
average	avg
address	addr
authority / authorize	auth
attribute	attr
asynchronization	asyn
button	btn
buffer	buff
command	cmd
compare	cmp
calculate	calc
calendar	cal
character	char
delete	del
document	doc
define	def
develop	dev
department	dept
different	diff
directory	dir
dictionary	dict
duplicate / duplication	dup
dependency / dependent / depends	dep
error	err
escape	esc
environment	env
educate / education	edu
equal / equality / equivalence / equivalent	eq
frequency	freq
government	gov
information	info
initialize	init
individual	indv
image	img
escpae	esc
length	len
message	msg
maximum	max
minimum	min
navigation	nav
number	num
object	obj
operator	opr
organization	org
picture	pic
previos	pre
package	pkg
parameter	param
password	pwd
position	pos
properties	props
request	req
response	rsp
record	rec
reference	ref
register	reg
resource	res
receive / received	recv
string	str
source	src
standard	std
statistic	stat
student	stu
summation / summary	sum
system	sys
system	sys
sequence	seq
synchronize	sync
temporary	tmp/temp
translate	trans
user	usr
utility	util
variable	var
window	win