Stanford Extended ASCII

Stanford Extended ASCII (SEASCII) is a derivation of the 7-bit ASCII character set developed at the Stanford Artificial Intelligence Laboratory (SAIL/SU-AI) in the early 1970s. Not all symbols match ASCII.

Carnegie Mellon University, the Massachusetts Institute of Technology, and the University of Southern California also had their own modified versions of ASCII.

Character set

Each character is given with a potential Unicode equivalent.

SEASCII

0

1

2

3

4

5

6

7

8

9

A

B

C

D

E

F

0x

·

↓

α

β

∧/^

¬

ε

π

λ

γ

δ

∫

±

⊕

∞

∂/∇

1x

⊂

⊃

∩

∪

∀

∃

⊗

↔

_

→

~

≠

≤

≥

≡/≍

∨

2x

SP

!

"

#

$

%

&

'

(

)

*

+

,

-

.

/

3x

0

1

2

3

4

5

6

7

8

9

:

;

<

=

>

?

4x

@

A

B

C

D

E

F

G

H

I

J

K

L

M

N

O

5x

P

Q

R

S

T

U

V

W

X

Y

Z

[

\

]

↑

←

6x

`

a

b

c

d

e

f

g

h

i

j

k

l

m

n

o

7x

p

q

r

s

t

u

v

w

x

y

z

{

|

◊

}

^

  Differences from ASCII

See also

• Stanford Artificial Intelligence Laboratory (SAIL/SU-AI)
• Stanford Artificial Intelligence Language (SAIL)
• Stanford/ITS character set

Further reading

• "double bucky". Free On-line Dictionary of Computing (FOLDOC). 1994-12-07. Archived from the original on 2017-03-07. Retrieved 2017-03-07.
• Knuth, Donald Ervin (1979). TEX and METAFONT — New Directions in Typesetting. Bedford, MA, USA: Digital Press. p. 169. ISBN 0-932376-02-9. (NB. Shows a table of SEASCII differing in a few code points from that described in RFC 698.)