Purchase PIN number to enable calculations. Consulting fees

LMNO Engineering, Research, and Software, Ltd.


Topics on this page:   Purchase calculations PIN     Consulting fees

Calculations PIN number

Step 1. Before paying for on-line calculations, please test to determine if our calculations will run on your computer.

You must have cookies enabled in your browser to perform the test and to use the calculations after you have paid for them.

Enter the password "test" below (lowercase without the quotes) then return to this page (Registration page). If the words "Not registered user" change to "All features enabled" and the "Click to Calculate" button works and adds the two numbers, then the calculations will fully run on your computer after entering a purchased PIN number.

Enter value for A:  
Enter value for B:  
Compute A+B:  

Step 2. After testing, be sure to delete the test cookie from your computer by clicking the "Delete Cookie" button below.

If you don't, our home page will say "Welcome Registered User" (since it says that for any cookie set by our server), but none of the calculations will work except the test calculation. You won't be able to enter a purchased PIN until the test cookie is deleted. The test cookie will automatically be deleted after a day.

Step 3. Purchase PIN number for on-line calculations

To activate the Calculate buttons on the entire LMNO Engineering website (all calculations), you may register by securely paying using PayPal by clicking on the credit card image. After paying, a PIN number will be sent to your email address (usually within 1 minute but possibly up to 30 minutes). Then type the PIN into our home page.

We provide the following subscriptions for on-line calculations:

7 days for 1 to 5 computers. $40 (US Dollars).

90 days for 1 to 5 computers. $90 (US Dollars).

1 year for 1 to 5 computers. $200 (US Dollars).

30 days for up to 30 computers. $120 (US Dollars).

To purchase, select the subscription that you would like from the drop-down menu. You do not need to type any comments in the text field unless you would like to. Then, click on the credit card image:


We also accept credit card orders over the phone. Call (740) 707-2614 or email (LMNO@LMNOeng.com) for additional website time limits and computer licenses, such as for a class or large company.

We want happy customers! If you are not completely satisfied with the quality and accessibility of our website, let us know within 30 days of your purchase and we will refund your payment. More information about our subscription service can be found below in the How our on-line calculations system works section.


Consulting and other payments      To top of page
We provide simple services (simple to us) for free. However, if a task will take some time, we request payment. New clients should always contact us by phone (740) 707-2614 or email LMNO@LMNOeng.com to discuss the project.

We accept payment by phone or on-line. To pay on-line for consulting or other purchases, describe your purchase in the text field. Then click on the credit card image (enter the cost on the PayPal page after clicking on the credit card image):


Check, money order, or purchase order
Purchase orders can be mailed, faxed, or emailed; we will invoice you for the charges. Checks and money orders should be made payable to LMNO Engineering, Research, and Software, Ltd. (or simply LMNO Engineering). Our address is:

LMNO Engineering, Research, and Software, Ltd.
7860 Angel Ridge Rd.
Athens, Ohio  45701  USA

Phone: (740) 707-2614,  email: LMNO@LMNOeng.com

How our on-line calculations system works
Once you receive a calculations PIN, go to the LMNO Engineering home page, https://www.LMNOeng.com, and type it in. A program will automatically check if your PIN is valid. If the PIN is valid, then a cookie will be saved to your computer. The cookie indicates how many computers can use your PIN and the duration purchased. You will not have to re-type the PIN on future visits to our website unless you use a different computer. If you routinely use different brands of web browsers (e.g. Firefox, Chrome, Safari, Edge, Internet Explorer, etc) on the same computer, each browser is recognized as a different computer; so try to avoid using different browsers from the same computer unless you have excess licenses. Your access time (duration) is determined based on the first date and time you type the PIN into our home page. Date and time are determined by our server. For example, if you paid for 7 days of access and type in the PIN on May 2, 2021, at 8:00 AM, then your PIN expires May 9, 2021, at 8:00 AM. It doesn't matter how many times you visit the website during those 7 days. If you type in the same PIN on a second computer on May 4, 2021, at 11:00 AM, the expiration for the second computer will also be May 9, 2021, at 8:00 AM. If you go back and forth between web pages, you may need to hit the Refresh button for "All features enabled" to appear in some browsers.

Conditions of use
All of our web pages and programs/calculations are copyrighted. This means that the .asf, .htm, .html, .shtml, php, .GIF, .jpg, and .exe files are the property of LMNO Engineering, Research, and Software, Ltd., and you cannot modify, copy, or redistribute them for profit or not for profit without our permission. This limitation, of course, does not apply to the web page output (what you see on the screen). You may print out or copy/paste any of the screens on our website so long as you include our copyright notices. This allows, for example, engineering consulting firms to include our web pages in their reports to clients. However, you may not put the images on another website. They are copyrighted and are not public domain.

What is a cookie? A cookie is a line of information that is saved to a special file on your hard disk created by your web browser (Internet Explorer, Firefox, Chrome, Safari, etc.). Most browsers are set to accept cookies automatically. However, if you are averse to accepting cookies, you can set your browser to accept cookies (click the advanced button after selecting options or preferences) when you enter your PIN; then you can turn off cookies. Some people are averse to cookies because they don't want anything written by a website to their hard disk. Cookies do not spread computer viruses, and most websites utilize cookies. If you delete your cookie file, you will be asked to re-enter the PIN and our database will count that as another of your computer licenses.


© 1999-2024 LMNO Engineering, Research, and Software, Ltd.  All rights reserved.

LMNO Engineering, Research, and Software, Ltd.
7860 Angel Ridge Rd.   Athens, Ohio  45701  USA   Phone: (740) 707-2614
LMNO@LMNOeng.com    https://www.LMNOeng.com


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Phone: (740) 707-2614 (USA)