digraph abbildung2 {
HP -> {IBM, Oracle, Intel} [arrowsize=.7, penwidth=4];
HP -> {Microsoft, Cisco};
Oracle -> {IBM, HP} [arrowsize=.7, penwidth=4];
Oracle -> {Microsoft, Cisco};
IBM -> {Oracle, HP} [arrowsize=.7, penwidth=4];
IBM -> {Microsoft, Ericsson, Cisco, Intel};
Ericsson -> {Cisco, Intel} [arrowsize=.7, penwidth=4];
Ericsson -> {IBM};
IBM -> Microsoft;
}