= B =
blinkenlights /blink'*n-li:tz/ n.
diagnostic lights on a computer, esp. a dinosaur. Now that
dinosaurs are rare, this term usually refers to status lights on a
modem, network hub, or the like.
This term derives from the last word of the famous
blackletter-Gothic sign in mangled pseudo-German that once graced
about half the computer rooms in the English-speaking world. One
version ran in its entirety as follows:
ACHTUNG! ALLES LOOKENSPEEPERS!
Das computermachine ist nicht fuer gefingerpoken und mittengrabben.
Ist easy schnappen der springenwerk, blowenfusen und poppencorken
mit spitzensparken. Ist nicht fuer gewerken bei das dumpkopfen.
Das rubbernecken sichtseeren keepen das cotten-pickenen hans in das
pockets muss; relaxen und watchen das blinkenlichten.
This silliness dates back at least as far as 1959 at Stanford
University and had already gone international by the early 1960s,
when it was reported at London University's ATLAS computing site.
There are several variants of it in circulation, some of which
actually do end with the word `blinkenlights'.
In an amusing example of turnabout-is-fair-play, German hackers
have developed their own versions of the blinkenlights poster in
fractured English, one of which is reproduced here:
This room is fullfilled mit special electronische equippment.
Fingergrabbing and pressing the cnoeppkes from the computers is
allowed for die experts only! So all the "lefthanders" stay away
and do not disturben the brainstorming von here working
intelligencies. Otherwise you will be out thrown and kicked
anderswhere! Also: please keep still and only watchen astaunished
See also geef.
Old-time hackers sometimes get nostalgic for blinkenlights because
they were so much more fun to look at than a blank panel. Sadly,
very few computers still have them (the three LEDs on a PC keyboard
certainly don't count). The obvious reasons (cost of wiring, cost
of front-panel cutouts, almost nobody needs or wants to interpret
machine-register states on the fly anymore) are only part of the
story. Another part of it is that radio-frequency leakage from the
lamp wiring was beginning to be a problem as far back as transistor
machines. But the most fundamental fact is that there are very few
signals slow enough to blink an LED these days! With slow CPUs,
you could watch the bus register or instruction counter tick, but
at 33/66/150MHz it's all a blur.
Despite this, a couple of relatively recent computer designs of
note have featured programmable blinkenlights that were added just
because they looked cool. The Connection Machine, a
65,536-processor parallel computer designed in the mid-1980s, was a
black cube with one side covered with a grid of red blinkenlights;
the sales demo had them evolving life patterns. A few years
later the ill-fated BeBox (a personal computer designed to run the
BeOS operating system) featured twin rows of blinkenlights on the
case front. When Be, Inc. decided to get out of the hardware
business in 1996 and instead ported their OS to the PowerPC and
later to the Intel architecture, many users severly suffered from
the absence of their beloved blinkenlights. Before long an
external version of the blinkenlights driven by a PC serial port
became available; there is some sort of plot symmetry in the fact
that it was assembled by a German.
Finally, a version updated for the Internet has been seen on
ACHTUNG! ALLES LOOKENSPEEPERS!
Das Internet is nicht fuer gefingerclicken und giffengrabben. Ist easy
droppenpacket der routers und overloaden der backbone mit der spammen
und der me-tooen. Ist nicht fuer gewerken bei das dumpkopfen. Das
mausklicken sichtseeren keepen das bandwit-spewin hans in das pockets
muss; relaxen und watchen das cursorblinken.
This newest version partly reflects reports that the word
`blinkenlights' is (in 1999) undergoing something of a revival in
usage, but applied to networking equipment. The transmit and
receive lights on routers, activity lights on switches and hubs,
and other network equipment often blink in visually pleasing and
seemingly coordinated ways. Although this is different in some ways
from register readings, a tall stack of Cisco equipment or a
19-inch rack of ISDN terminals can provoke a similar feeling of
hypnotic awe, especially in a darkened network operations center or
--The Jargon File version 4.3.1, ed. ESR, autonoded by rescdsk.