I-140/I-485 Filing
I-140 and I-485 can be filed concurrently or in various different ways.

Concurrent: I-140 and I-485 filed concurrently.

Non-Concurrent: I-485 filed after I-140 was approved.

Semi-Concurrent: I-485 filed after I-140 was filed, but before I-140 was approved.

Consular Processing: I-485 was not filed. Instead consular processing was requested at the time of filing I-140.

Advance Parole.

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Employment based, family based or other such as lottery,asylum or refugee.

Employment based categories

Family based categories

Country of Birth. It is NOT country of citizenship.
Employment Authorization Document. Granted by the USCIS to temporary visa holders for permission to work in the United States. There can be many different situations for a work authorization such as adjustment of status applicants, F1 students that want practical training, and spouses of L1 visa holders.

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Labor Certification
Requirement for U.S. employers seeking to employ certain persons whose immigration to the United States is based on job skills or nonimmigrant temporary workers coming to perform services for which qualified authorized workers are unavailable in the United States. Labor certification is issued by the Secretary of Labor and contains attestations by U.S. employers as to the numbers of U.S. workers available to undertake the employment sought by an applicant, and the effect of the alien’s employment on the wages and working conditions of U.S. workers similarly employed. Determination of labor availability in the United States is made at the time of a visa application and at the location where the applicant wishes to work.

For family based greencard applicants or with applicants with exceptional abilities, labor certification is not required.

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National Visa Center. It gets the applications from USCIS that in turn deals with US embassies and consulates worldwide for consular processing.
Notice Date
After receiving an application, USCIS may take some time before sending the notice that application was received, it is pending etc. The date when USCIS sends such notice.
Priority Date
The date an immigrant visa petition is filed with immigration or in some cases the date of a Labor Certification Application is first filed with a State Labor Department. The priority date determines your place in line in an immigrant preference category.
Receipt Date
The date when USCIS receives the application.
Receipt Number
When USCIS receives the application, it assigns a unique number to each case. Receipt number includes the codes for service center, the day of the year when the case was received and several more digits uniquely identifying each case.
Request For Evidence. When an application is pending with USCIS, many times they come back asking for further evidence. Such evidence could be regarding anything such as applicant’s continued employment, company’s financial position and ability to pay, applicant’s medical condition etc.
Service Center
There are four regional service centers (California, Nebraska, Texas and Vermont). These centers process green card applications, adjustment of status applications, and temporary visa applications. There are also many local USCIS offices that handle naturalization, certain visa issues, and work authorizations.
Status Date
Date when the case was certified, denied, or withdrawn.

 Labor Certification 
Application Type
RIR – Reduction In Recruiment. Expedited process where shortage of labor has already been proved prior to filing labor certification.

Regular – Lengthier process that has to go through series of advertisements before labor certification can be approved.

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Company Location
Physical location of company where the alien performs(or will perform) his/her regular job duties.
Minimum degree required to qualify for the job.
DOL Location
Department Of Labor location.

All DOL Locations

Department Of Labor – Request For Evidence
DOL Receipt Date
Date when DOL received the application.
DOT Code
Dictionary of Occupational Titles Code.

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Remanded To State
Whether the case was remanded back to SESA from DOL.
State Employment Security Agency. Agency in the state where the job is located.

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SESA Receipt Date
Date when SESA received the application. This becomes the Priority Date.
Minimum skillset required for the job, in addition to the degree requirement.
Status Date
Date when the case was certified, denied, or withdrawn.

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