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- w1Computer Cryptogramsw0
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- (c) 1990 RWare Inc.
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-
- Disclaimer:
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- Robert's ShareWare makes no claims to the fitness or accuracy of this
- documentation and the described program, and disclaims any liability to
- any damages that may result from using this program.
-
-
- This program is ShareWare
-
- This program and the included files are distributed ShareWare Concept.
- This means you try the program and your are not out the money if you
- don't like it. You are free ( and encouraged ) to give anyone a copy
- of the the UNREGISTERED versions of the program and the included files.
- If you like this program I urge you to register it. By registering,
- you get a version of the program without an opening screen and 1000
- new cryptograms. It doesn't cost much, and it encourages the author to
- produce more low-cost shareware.
-
- Registering Computer Cryptograms
-
- Registering is easy and only costs $10. By registering, you get a copy
- of the registered version of Computer Cryptograms and 1000 new cryptograms.
- on 360k 5.25 diskette.
-
- Fill and this form and send to:
-
- -----------------------------------------------------------------------------
-
- RWare Inc.
- 1510 Silver Creek Circle
- Norman, Oklahoma 73071
-
-
- Name :_______________________________________
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- Address :_______________________________________
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- _______________________________________
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- City :_________________________ State:_______
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- Zip :_________________
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- CPU: 8088/86 ( ) 80286 ( ) 80386 ( ) 80486 ( )
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- DOS version:_________________________
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- Do you own Windows? Yes ( ) No ( )
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- Do you own OS/2? Yes ( ) No ( )
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- _____________________________________________________________________________
-
-
- What is a Cryptogram?
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- A cryptogram is simply an English phrase that has been encrypted using a
- simple letter subsitution cipher. For example: THE BIG YELLOW CAT is
- may be transformed to QTR YUV WRXXPD ESQ where Q is subsituted for T, T for
- H, R for E, ect. You can break the code by watching the frequency of certain
- letters and how they are grouped. Cryptograms are alot of fun to solve,
- and a nice way to induce the 'ah-ha' experience.
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- What is Computer Cryptograms?
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- You may have seen cryptograms in puzzle magazines. Computer Cryptograms
- is a program that allows you to solve cryptogram without erasing holes
- through the pages in a puzzle book. The Shareware demonstration version
- of Computer Cryptograms comes with 75 cryptograms. When you run the program,
- you are prompted to pick a set of cryptograms from the available cryptogram
- files, they have the file extensions '.CRG' After selecting a set, the display
- shows the current cryptogram in a box, the top displays the filename of the
- current set of cryptograms and the number of the current cryptogram, and the
- lower portion of the screen shows the unused letters and the key. The key is
- stored in the file, so the program and the .CRG files must reside on a
- non-write protected disk so that they may be updated. This means you may
- abandon a cryptogram and try it again later without starting over.
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- Commands:
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- To try a subsitution simply press the letter that is in encrypted phrase
- and then the letter of the substution. The substituted letter will appear over each
- occurence of the letter in the cryptogram and in the key.
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- <F1> Clear Key. Clearing the key will erase all of the substitutions so
- you can start with a clean slate.
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- <F2> Next Cryptogram. This places the next cryptogram in the set in the
- window.
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- <F3> Another Set. This allows you to select another set of cryptogram by
- showing you a directory of all the cryptogram files.
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- <F4> While solving a cryptogram, you may want to back up. Pressing <F4>
- undo's the last subsititution or <F1> command.
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- <Esc> Quits Computer Cryptograms so you can work.
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- Tips for solving Cryptograms
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- Look for letters with a high frequency. The letters E, T, O, I, U, and S
- have a high frequency in English.
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- Look for single letter words. These word are most likely 'A' or 'I' and less
- frequently 'O'.
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- Try common two letter words like 'IS', 'IT', 'TO', 'OF', 'AN', and 'AS'.
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- Try common three letter words like 'THE' and 'AND'.
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- Look for apostrophies. These shorter words are most likely contractions
- such as 'IT'S', 'I'VE', 'ISN'T', 'DON'T'. Longer words probably indicate
- possesion as in 'WILLIAM'S'. An apostrophy on the end indcates that the last
- letter is an S.
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- Look for doubled letters. In the middle of words they are most likely vowels
- such as 'TOOL', 'CHEER', The vowels A, I, and U are rarely doubled. In
- other positions try the consonants L, S, F, T, M and N as in 'ALL', 'GRASS',
- 'EGG', 'OFF', 'LETTER', 'COMMON' and 'INN'.
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- Look for common English suffixes like '-TION', '-ING', '-ER', '-Y', '-LY'.
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- Look for common consonant groupings like 'TH', 'SH', 'CH', 'TR',
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- Look for common vowel groupings like 'IE', 'OU', 'AI'.
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- A word is most likely to end in E, S, or Y.
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- Y is most likely to start or end a word.
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- Q is very close to almost always follwed by a U.
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- Vowels tend to be in the middle of words, Consanants are most likely to
- start words.
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- About the program:
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- Computer Cryptograms was written entirely in Borland Turbo Pascal v5.5 by
- Robert Mashlan.
-
- If you should encounter any bugs or has suggestions for this program,
- send them to
- Robert Mashlan
- CIS: [71160,3067]
- USPS: 1510 Silver Creek Circle / Norman OK 73071
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