appointment
army
arranged
calendar
control
date
day
deadline
defense
detect
detection
device
electronic
equipment
event
flip
icon
indicator
location
locator
mark
marked
memo
military
monitor
month
period
plan
plane
radar
reminder
safe
scan
schedule
scope
screen
search
security
sonar
spy
symbol
target
technology
term
time
timing
tracking
waiting
week
year