This paper i s a b r i e f survey of the computer-aided i n t e rconnection routing techniques currently i n use a t various f ac i l i t i e s as p a r t of t h e i r software packages. pros and cor2s of t h e techniques avaiZable and also i n d i c a t e s further research areas i n the f u t u r e . Excellent r e v i m papers s i m i l a r to the one presented here have been published previously [26,55,561,
which cover a wider range o f subjects on design automation i n general. Many of t h e subjects mentioned i n the above references are deliberately repeated here since the current paper i s intended f o r t u t o r i a l purposes.topics m e urged to read the aforementioned references.