CREDIT LINES Figure I.13(c) 1995 Andy J. Williams Figure I.11(b) 1994-1995 Netscape Communications Corporation. All rights reserved. Figure I.12(b) 1994-1995 Netscape Communications Corporation. All rights reserved. Figure I.13(b) 1994-1995 Netscape Communications Corporation. All rights reserved. Figure I.14(a) 1994-1995 Netscape Communications Corporation. All rights reserved. Table I.1 1994-1995 Netscape Communications Corporation. All rights reserved. Figure I.34(b) 1994-1995 Netscape Communications Corporation. All rights reserved. Figure I.35(b) 1994-1995 Netscape Communications Corporation. All rights reserved. Figure I.64(c) 1994-1995 Netscape Communications Corporation. All rights reserved. Figure II.10(b) 1994-1995 Netscape Communications Corporation. All rights reserved. Figure II.16(b) 1994-1995 Netscape Communications Corporation. All rights reserved. Figure II.25(b) 1994-1995 Netscape Communications Corporation. All rights reserved. Figure II.26(b) 1994-1995 Netscape Communications Corporation. All rights reserved. Figure II.28(b) 1994-1995 Netscape Communications Corporation. All rights reserved. Figure II.41(b) 1994-1995 Netscape Communications Corporation. All rights reserved. Figure V.14(b) 1994-1995 Netscape Communications Corporation. All rights reserved. Figure V.15(b) 1994-1995 Netscape Communications Corporation. All rights reserved. Figure V.16(b) 1994-1995 Netscape Communications Corporation. All rights reserved. Figure V.19(b) 1994-1995 Netscape Communications Corporation. All rights reserved. Figure V.20(b) 1994-1995 Netscape Communications Corporation. All rights reserved. Figure V.21(b) 1994-1995 Netscape Communications Corporation. All rights reserved. Figure I.40 1994 Association for Computing Machinery Figure I.51 1987 IEEE Figure I.52 1989 Association for Computing Machinery Figure I.53 1989 Association for Computing Machinery Figure I.54 1989 Association for Computing Machinery Figure I.61 1991 Association for Computing Machinery Figure I.62 1991 Association for Computing Machinery Figure I.63 1991 Association for Computing Machinery Figure I.68 reproduced with permission of Sougata Mukherjea, GVU Center, Georgia Institute of Technology. Copyright 1996. Figure I.69 reproduced with permission of Sougata Mukherjea, GVU Center, Georgia Institute of Technology. Copyright 1996. Figure I.70 reproduced with permission of Sougata Mukherjea, GVU Center, Georgia Institute of Technology. Copyright 1996. Figure I.71 Copyright NetCarta Corporation Figure I.78 1988 Association for Computing Machinery Figure I.79 1988 Association for Computing Machinery Figure I.80 1988 Association for Computing Machinery Figure II.1 1993 IEEE Figure IV.1 Adobe and Adobe Premiere are trademarks of Adobe Systems Incorporated.